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"Process For Preparation Of Chlorodifluoroacetic Anhydride"
Abstract: The present invention provides a process for the preparation of chlorodifluoroacetic anhydride from chlorodifluoroacetic acid by reacting chlorodifluoroacetic acid with oleum and refluxing the reaction mixture followed by distillation to obtain pure chlorodifluoroacetic anhydride. The process uses cheap and readily available raw material and the product is obtained in good yield and high purity. Also, the byproduct obtained in the process is H2SO4 which is a liquid and can be reused thus eliminating disposal problems.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
23 November 2011
Publication Number
21/2013
Publication Type
INA
Invention Field
PHARMACEUTICALS
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2018-03-19
Renewal Date
Applicants
SRF LIMITED
BLOCK-C SECTOR 45, UNICREST BUILDING, GURGAON, HARYANA (INDIA);
Inventors
1. DHINGRA, SURENDER
SRF LIMITED, BLOCK-C SECTOR 45, UNICREST BUILDING, GURGAON, HARYANA (INDIA);
2. THAKUR, SHELEN
SRF LIMITED, BLOCK-C SECTOR 45, UNICREST BUILDING, GURGAON, HARYANA (INDIA);
3. SAXENA, RAHUL
SRF LIMITED, BLOCK-C SECTOR 45, UNICREST BUILDING, GURGAON, HARYANA (INDIA);
4. ANAND, RAJEEP
SRF LIMITED, BLOCK-C SECTOR 45, UNICREST BUILDING, GURGAON, HARYANA (INDIA);
Specification
NA
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 3339-del-2011-Form-5.pdf | 2012-06-02 |
| 2 | 3339-del-2011-Form-3.pdf | 2012-06-02 |
| 3 | 3339-del-2011-Form-2.pdf | 2012-06-02 |
| 4 | 3339-del-2011-Form-1.pdf | 2012-06-02 |
| 5 | 3339-del-2011-Description (Complete).pdf | 2012-06-02 |
| 6 | 3339-del-2011-Correspondence-Others.pdf | 2012-06-02 |
| 7 | 3339-del-2011-Claims.pdf | 2012-06-02 |
| 8 | 3339-del-2011-Abstract.pdf | 2012-06-02 |
| 9 | 3339-del-2011-GPA-(12-06-2012).pdf | 2012-06-12 |
| 10 | 3339-del-2011-Form-1 (12-06-2012).pdf | 2012-06-12 |
| 11 | 3339-del-2011-Corrspondence others-(12-06-2012).pdf | 2012-06-12 |
| 12 | 3339-del-2011-Form-18-(05-07-2013).pdf | 2013-07-05 |
| 13 | 3339-del-2011-Correspondence-Others-(05-07-2013).pdf | 2013-07-05 |
| 14 | 3339-DEL-2011-FER.pdf | 2017-09-19 |
| 15 | 3339-DEL-2011-RELEVANT DOCUMENTS [12-03-2018(online)].pdf | 2018-03-12 |
| 16 | 3339-DEL-2011-PETITION UNDER RULE 137 [12-03-2018(online)].pdf | 2018-03-12 |
| 17 | 3339-del-2011-OTHERS [12-03-2018(online)].pdf | 2018-03-12 |
| 18 | 3339-DEL-2011-MARKED COPIES OF AMENDEMENTS [12-03-2018(online)].pdf | 2018-03-12 |
| 19 | 3339-del-2011-FER_SER_REPLY [12-03-2018(online)].pdf | 2018-03-12 |
| 20 | 3339-del-2011-CLAIMS [12-03-2018(online)].pdf | 2018-03-12 |
| 21 | 3339-DEL-2011-Changing Name-Nationality-Address For Service [12-03-2018(online)].pdf | 2018-03-12 |
| 22 | 3339-DEL-2011-AMENDED DOCUMENTS [12-03-2018(online)].pdf | 2018-03-12 |
| 23 | 3339-DEL-2011-PatentCertificate19-03-2018.pdf | 2018-03-19 |
| 24 | 3339-DEL-2011-IntimationOfGrant19-03-2018.pdf | 2018-03-19 |
| 25 | 3339-DEL-2011-OTHERS-040418.pdf | 2018-04-13 |
| 26 | 3339-DEL-2011-OTHERS-040418-.pdf | 2018-04-13 |
| 27 | 3339-DEL-2011-Correspondence-040418.pdf | 2018-04-13 |
| 28 | 3339-DEL-2011-RELEVANT DOCUMENTS [19-03-2019(online)].pdf | 2019-03-19 |
| 29 | 3339-DEL-2011-RELEVANT DOCUMENTS [25-03-2020(online)].pdf | 2020-03-25 |
| 30 | 3339-DEL-2011-RELEVANT DOCUMENTS [22-09-2021(online)].pdf | 2021-09-22 |
| 31 | 3339-DEL-2011-RELEVANT DOCUMENTS [15-09-2022(online)].pdf | 2022-09-15 |
| 32 | 3339-DEL-2011-RELEVANT DOCUMENTS [26-09-2023(online)].pdf | 2023-09-26 |
Search Strategy
| 1 | search_18-09-2017.pdf |