Patent US2938932A successfully refreshed from Google Patents.
US2938932A
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Preparation of acetylenic grignard compounds
Assignee: Rhone Poulenc SA
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Filing: 1957-11-29
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Granted: 1960-05-31
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Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 Normant Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:55
CPC Classifications
C; C07; C07F; C07F3/00; C07F3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR THE PRODUCTION OF ACETYLENIC GRIGNARD COMPOUNDS WHICH COMPRISES REACTING AN ACETYLENIC COMPOUND OF GENERAL FORMULA R.C$C.X'' (WHEREIN R REPRESENTS RADICAL CHOSEN FROM THE GROUP CONSISTING OF ALKYL, ARYL, AND ARALKYL GROUPS, AND X'' REPRESENTS AN ATOM CHOSEN FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE ATOMS) WITH MAGNESIUM UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS IN A SOLVENT ETHER CHOSEN FROM THE GROUP CONSISTING OF ETHERS OF GENERAL FORMULA
Claim 2
Dependent Claim
69 words
A PROCESS FOR THE PRODUCTION OF ACETYLENIC GRIGNARD COMPOUNDS WHICH COMPRISES REACTING AN ACETYLENIC COMPOUND OF GENERAL FORMULA R.C$C.X'' (WHEREIN R REPRESENTS RADICAL CHOSEN FROM THE GROUP CONSISTING OF ALKYL, ARYL, AND ARALKYL GROUPS, AND X'' REPRESENTS AN ATOM CHOSEN FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE ATOMS) WITH MAGNESIUM UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS IN A SOLVENT ETHER CHOSEN FROM THE GROUP CONSISTING OF ETHERS OF GENERAL FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |