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"Steel Wire For High Strength Spring"
Abstract: High strength steel wire for spring containing, by mass%, C: 0.67% to less than 0.75%, Si: 2.0 to 2.5%, Mn: 0.5 to 1.2%, Cr: 0.8 to 1.3%, V: 0.03 to 0.20%, Mo: 0.05 to 0.25%, W: 0.05 to 0.30%, and N: 0.003 to 0.007%, having a total of contents of Mn and V of 0.70%≤Mn+V≤l.27% and a total of contents of Mo and W of 0.13%≤Mo+W≤0.35%, limiting P: 0.025% or less, S: 0.025% or less, and Al: 0.003% or less, and having a balance of iron and unavoidable impurities, having a microstructure comprised of, by volume percent, over 6% to 15% of retained austenite and tempered martensite, having a prior-austenite grain size number of 10 or more, having a density of presence of spheroidal carbides with a circle equivalent diameter of 0.2 to 0.5 µm of 0.06 particles/µm2 or less, having a density of presence of spheroidal carbides with a circle equivalent diameter of over 0.5 µm of 0.01 particles/µm2 or less, and having a tensile strength of 2100 to 2350 MPa.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
19 December 2011
Publication Number
05/2013
Publication Type
INA
Invention Field
METALLURGY
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2017-08-21
Renewal Date
Applicants
NIPPON STEEL CORPORATION
6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
SUZUKI METAL INDUSTRY CO., LTD
9-1, MARUNOUCHI 1-CHOME, CHIYODA-KU, TOKYO 1000005, JAPAN
HONDA MOTOR CO., LTD.
1-1, MINAMIAOYAMA 2-CHOME, MINATO-KU, TOKYO 107 8556, JAPAN
Inventors
1. MASAYUKI HASHIMURA
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 1008071, JAPAN
2. HITOSHI DEMACHI
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 1008071, JAPAN
3. TAKAYUKI KISU
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 1008071, JAPAN
4. SHOICHI SUZUKI
C/O SUZUKI METAL INDUSTRY CO., LTD., 7-5-1, HIGASHINARASHINO, NARASHINO-SHI, CHIBA 275 8577, JAPAN
5. MOTONOBU SUEHIRO
C/O SUZUKI METAL INDUSTRY CO., LTD., 7-5-1, HIGASHINARASHINO, NARASHINO-SHI, CHIBA 275 8577, JAPAN
6. JUN KAWAGUCHI
C/O SUZUKI METAL INDUSTRY CO., LTD., 7-5-1, HIGASHINARASHINO, NARASHINO-SHI, CHIBA 275 8577, JAPAN
7. KEIICHI MAEKAWA
C/O HONDA R&D CO., LTD., 4-1, CHUO 1-CHOME, WAKO-SHI, SAITAMA 351 0193, JAPAN
8. ATSUSHI MURAKAMI
C/O HONDA R&D CO., LTD., 4-1, CHUO 1-CHOME, WAKO-SHI, SAITAMA 351 0193, JAPAN
Specification
NA
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 9990-delnp-2011-Form-3-(04-06-2012).pdf | 2012-06-04 |
| 1 | 9990-DELNP-2011-RELEVANT DOCUMENTS [16-09-2023(online)].pdf | 2023-09-16 |
| 2 | 9990-delnp-2011-Correspondence Others-(04-06-2012).pdf | 2012-06-04 |
| 2 | 9990-DELNP-2011-RELEVANT DOCUMENTS [30-08-2023(online)].pdf | 2023-08-30 |
| 3 | 9990-DELNP-2011-RELEVANT DOCUMENTS [28-09-2022(online)].pdf | 2022-09-28 |
| 3 | 9990-delnp-2011-GPA.pdf | 2012-06-28 |
| 4 | 9990-DELNP-2011-RELEVANT DOCUMENTS [31-08-2021(online)]-1.pdf | 2021-08-31 |
| 4 | 9990-delnp-2011-Form-5.pdf | 2012-06-28 |
| 5 | 9990-DELNP-2011-RELEVANT DOCUMENTS [31-08-2021(online)].pdf | 2021-08-31 |
| 5 | 9990-delnp-2011-Form-3.pdf | 2012-06-28 |
| 6 | 9990-delnp-2011-Form-2.pdf | 2012-06-28 |
| 6 | 9990-DELNP-2011-ASSIGNMENT WITH VERIFIED COPY [16-08-2021(online)].pdf | 2021-08-16 |
| 7 | 9990-delnp-2011-Form-18.pdf | 2012-06-28 |
| 7 | 9990-DELNP-2011-FORM-16 [16-08-2021(online)].pdf | 2021-08-16 |
| 8 | 9990-DELNP-2011-POWER OF AUTHORITY [16-08-2021(online)].pdf | 2021-08-16 |
| 8 | 9990-delnp-2011-Form-1.pdf | 2012-06-28 |
| 9 | 9990-delnp-2011-Drawings.pdf | 2012-06-28 |
| 9 | 9990-DELNP-2011-PROOF OF ALTERATION [16-08-2021(online)]-1.pdf | 2021-08-16 |
| 10 | 9990-delnp-2011-Description (Complete).pdf | 2012-06-28 |
| 10 | 9990-DELNP-2011-PROOF OF ALTERATION [16-08-2021(online)].pdf | 2021-08-16 |
| 11 | 9990-delnp-2011-Correspondence-others.pdf | 2012-06-28 |
| 11 | 9990-DELNP-2011-RELEVANT DOCUMENTS [01-04-2020(online)].pdf | 2020-04-01 |
| 12 | 286482-Correspondence-110719.pdf | 2019-07-19 |
| 12 | 9990-delnp-2011-Claims.pdf | 2012-06-28 |
| 13 | 286482-OTHERS-110719.pdf | 2019-07-19 |
| 13 | 9990-delnp-2011-Abstract.pdf | 2012-06-28 |
| 14 | 286482-Power of Attorney-110719.pdf | 2019-07-19 |
| 14 | 9990-delnp-2011-Correspondence-others- (18-09-2012).pdf | 2012-09-18 |
| 15 | 9990-delnp-2011-Correspondence-Others-(01-02-2013).pdf | 2013-02-01 |
| 15 | Office Communication- F-13 disposed-(09-07-2019).pdf | 2019-07-09 |
| 16 | 9990-DELNP-2011-FORM 13 [02-07-2019(online)].pdf | 2019-07-02 |
| 16 | 9990-delnp-2011-GPA-(08-07-2013).pdf | 2013-07-08 |
| 17 | 9990-DELNP-2011-RELEVANT DOCUMENTS [02-07-2019(online)].pdf | 2019-07-02 |
| 17 | 9990-delnp-2011-Form-2-(08-07-2013).pdf | 2013-07-08 |
| 18 | 9990-delnp-2011-Form-1-(08-07-2013).pdf | 2013-07-08 |
| 18 | 9990-DELNP-2011-RELEVANT DOCUMENTS [19-03-2019(online)]-1.pdf | 2019-03-19 |
| 19 | 9990-delnp-2011-Correspondence-Others-(08-07-2013).pdf | 2013-07-08 |
| 19 | 9990-DELNP-2011-RELEVANT DOCUMENTS [19-03-2019(online)].pdf | 2019-03-19 |
| 20 | 9990-delnp-2011-Form-3-(08-08-2013).pdf | 2013-08-08 |
| 20 | 9990-DELNP-2011-RELEVANT DOCUMENTS [09-03-2018(online)].pdf | 2018-03-09 |
| 21 | 9990-DELNP-2011-Correspondence-180817.pdf | 2017-08-24 |
| 21 | 9990-delnp-2011-Correspondence-Others-(08-08-2013).pdf | 2013-08-08 |
| 22 | 9990-delnp-2011-Form-3-(28-08-2014).pdf | 2014-08-28 |
| 22 | 9990-DELNP-2011-OTHERS-180817.pdf | 2017-08-24 |
| 23 | 9990-delnp-2011-Correspondence-Others-(28-08-2014).pdf | 2014-08-28 |
| 23 | 9990-DELNP-2011-IntimationOfGrant21-08-2017.pdf | 2017-08-21 |
| 24 | 9990-DELNP-2011-PatentCertificate21-08-2017.pdf | 2017-08-21 |
| 24 | 9990-DELNP-2011-Form 3-121214.pdf | 2014-12-29 |
| 25 | 9990-DELNP-2011-Correspondence-121214.pdf | 2014-12-29 |
| 25 | 9990-DELNP-2011-Correspondence-310717.pdf | 2017-08-10 |
| 26 | 9990-delnp-2011-Form-3-(27-05-2015).pdf | 2015-05-27 |
| 26 | 9990-DELNP-2011-Power of Attorney-310717.pdf | 2017-08-10 |
| 27 | 9990-delnp-2011-Correspondence Others-(27-05-2015).pdf | 2015-05-27 |
| 27 | 9990-DELNP-2011-PETITION UNDER RULE 137 [04-08-2017(online)].pdf | 2017-08-04 |
| 28 | 9990-DELNP-2011-Proof of Right (MANDATORY) [04-08-2017(online)].pdf | 2017-08-04 |
| 28 | Form 3 [25-01-2017(online)].pdf | 2017-01-25 |
| 29 | 9990-DELNP-2011-ABSTRACT [29-07-2017(online)].pdf | 2017-07-29 |
| 29 | 9990-DELNP-2011-FER.pdf | 2017-02-28 |
| 30 | 9990-DELNP-2011-FORM 3 [29-07-2017(online)].pdf | 2017-07-29 |
| 30 | 9990-DELNP-2011-CLAIMS [29-07-2017(online)].pdf | 2017-07-29 |
| 31 | 9990-DELNP-2011-COMPLETE SPECIFICATION [29-07-2017(online)].pdf | 2017-07-29 |
| 31 | 9990-DELNP-2011-FER_SER_REPLY [29-07-2017(online)].pdf | 2017-07-29 |
| 32 | 9990-DELNP-2011-CORRESPONDENCE [29-07-2017(online)].pdf | 2017-07-29 |
| 32 | 9990-DELNP-2011-DRAWING [29-07-2017(online)].pdf | 2017-07-29 |
| 33 | 9990-DELNP-2011-CORRESPONDENCE [29-07-2017(online)].pdf | 2017-07-29 |
| 33 | 9990-DELNP-2011-DRAWING [29-07-2017(online)].pdf | 2017-07-29 |
| 34 | 9990-DELNP-2011-COMPLETE SPECIFICATION [29-07-2017(online)].pdf | 2017-07-29 |
| 34 | 9990-DELNP-2011-FER_SER_REPLY [29-07-2017(online)].pdf | 2017-07-29 |
| 35 | 9990-DELNP-2011-CLAIMS [29-07-2017(online)].pdf | 2017-07-29 |
| 35 | 9990-DELNP-2011-FORM 3 [29-07-2017(online)].pdf | 2017-07-29 |
| 36 | 9990-DELNP-2011-ABSTRACT [29-07-2017(online)].pdf | 2017-07-29 |
| 36 | 9990-DELNP-2011-FER.pdf | 2017-02-28 |
| 37 | 9990-DELNP-2011-Proof of Right (MANDATORY) [04-08-2017(online)].pdf | 2017-08-04 |
| 37 | Form 3 [25-01-2017(online)].pdf | 2017-01-25 |
| 38 | 9990-delnp-2011-Correspondence Others-(27-05-2015).pdf | 2015-05-27 |
| 38 | 9990-DELNP-2011-PETITION UNDER RULE 137 [04-08-2017(online)].pdf | 2017-08-04 |
| 39 | 9990-delnp-2011-Form-3-(27-05-2015).pdf | 2015-05-27 |
| 39 | 9990-DELNP-2011-Power of Attorney-310717.pdf | 2017-08-10 |
| 40 | 9990-DELNP-2011-Correspondence-121214.pdf | 2014-12-29 |
| 40 | 9990-DELNP-2011-Correspondence-310717.pdf | 2017-08-10 |
| 41 | 9990-DELNP-2011-Form 3-121214.pdf | 2014-12-29 |
| 41 | 9990-DELNP-2011-PatentCertificate21-08-2017.pdf | 2017-08-21 |
| 42 | 9990-delnp-2011-Correspondence-Others-(28-08-2014).pdf | 2014-08-28 |
| 42 | 9990-DELNP-2011-IntimationOfGrant21-08-2017.pdf | 2017-08-21 |
| 43 | 9990-delnp-2011-Form-3-(28-08-2014).pdf | 2014-08-28 |
| 43 | 9990-DELNP-2011-OTHERS-180817.pdf | 2017-08-24 |
| 44 | 9990-DELNP-2011-Correspondence-180817.pdf | 2017-08-24 |
| 44 | 9990-delnp-2011-Correspondence-Others-(08-08-2013).pdf | 2013-08-08 |
| 45 | 9990-DELNP-2011-RELEVANT DOCUMENTS [09-03-2018(online)].pdf | 2018-03-09 |
| 45 | 9990-delnp-2011-Form-3-(08-08-2013).pdf | 2013-08-08 |
| 46 | 9990-delnp-2011-Correspondence-Others-(08-07-2013).pdf | 2013-07-08 |
| 46 | 9990-DELNP-2011-RELEVANT DOCUMENTS [19-03-2019(online)].pdf | 2019-03-19 |
| 47 | 9990-delnp-2011-Form-1-(08-07-2013).pdf | 2013-07-08 |
| 47 | 9990-DELNP-2011-RELEVANT DOCUMENTS [19-03-2019(online)]-1.pdf | 2019-03-19 |
| 48 | 9990-delnp-2011-Form-2-(08-07-2013).pdf | 2013-07-08 |
| 48 | 9990-DELNP-2011-RELEVANT DOCUMENTS [02-07-2019(online)].pdf | 2019-07-02 |
| 49 | 9990-DELNP-2011-FORM 13 [02-07-2019(online)].pdf | 2019-07-02 |
| 49 | 9990-delnp-2011-GPA-(08-07-2013).pdf | 2013-07-08 |
| 50 | 9990-delnp-2011-Correspondence-Others-(01-02-2013).pdf | 2013-02-01 |
| 50 | Office Communication- F-13 disposed-(09-07-2019).pdf | 2019-07-09 |
| 51 | 286482-Power of Attorney-110719.pdf | 2019-07-19 |
| 51 | 9990-delnp-2011-Correspondence-others- (18-09-2012).pdf | 2012-09-18 |
| 52 | 286482-OTHERS-110719.pdf | 2019-07-19 |
| 52 | 9990-delnp-2011-Abstract.pdf | 2012-06-28 |
| 53 | 286482-Correspondence-110719.pdf | 2019-07-19 |
| 53 | 9990-delnp-2011-Claims.pdf | 2012-06-28 |
| 54 | 9990-delnp-2011-Correspondence-others.pdf | 2012-06-28 |
| 54 | 9990-DELNP-2011-RELEVANT DOCUMENTS [01-04-2020(online)].pdf | 2020-04-01 |
| 55 | 9990-delnp-2011-Description (Complete).pdf | 2012-06-28 |
| 55 | 9990-DELNP-2011-PROOF OF ALTERATION [16-08-2021(online)].pdf | 2021-08-16 |
| 56 | 9990-delnp-2011-Drawings.pdf | 2012-06-28 |
| 56 | 9990-DELNP-2011-PROOF OF ALTERATION [16-08-2021(online)]-1.pdf | 2021-08-16 |
| 57 | 9990-DELNP-2011-POWER OF AUTHORITY [16-08-2021(online)].pdf | 2021-08-16 |
| 57 | 9990-delnp-2011-Form-1.pdf | 2012-06-28 |
| 58 | 9990-delnp-2011-Form-18.pdf | 2012-06-28 |
| 58 | 9990-DELNP-2011-FORM-16 [16-08-2021(online)].pdf | 2021-08-16 |
| 59 | 9990-delnp-2011-Form-2.pdf | 2012-06-28 |
| 59 | 9990-DELNP-2011-ASSIGNMENT WITH VERIFIED COPY [16-08-2021(online)].pdf | 2021-08-16 |
| 60 | 9990-DELNP-2011-RELEVANT DOCUMENTS [31-08-2021(online)].pdf | 2021-08-31 |
| 60 | 9990-delnp-2011-Form-3.pdf | 2012-06-28 |
| 61 | 9990-delnp-2011-Form-5.pdf | 2012-06-28 |
| 61 | 9990-DELNP-2011-RELEVANT DOCUMENTS [31-08-2021(online)]-1.pdf | 2021-08-31 |
| 62 | 9990-delnp-2011-GPA.pdf | 2012-06-28 |
| 62 | 9990-DELNP-2011-RELEVANT DOCUMENTS [28-09-2022(online)].pdf | 2022-09-28 |
| 63 | 9990-delnp-2011-Correspondence Others-(04-06-2012).pdf | 2012-06-04 |
| 63 | 9990-DELNP-2011-RELEVANT DOCUMENTS [30-08-2023(online)].pdf | 2023-08-30 |
| 64 | 9990-delnp-2011-Form-3-(04-06-2012).pdf | 2012-06-04 |
| 64 | 9990-DELNP-2011-RELEVANT DOCUMENTS [16-09-2023(online)].pdf | 2023-09-16 |
Search Strategy
| 1 | 9990DELNP2011_23-02-2017.pdf |