US3117952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving certain catalysts
Assignee: Wyeth Holdings LLC
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Filing: 1958-11-17
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Granted: 1964-01-14
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Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Lewis S Meriwether
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:38
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/24; B01J31/2404; B01J31/2409; B01J31/18; B01J31/1845; B01J31/22; B01J31/2282; B01J31/2286; C; C08; C08F; C08F10/00; B01J2231/00; B01J2231/10; B01J2231/12; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/847
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A PROCESS FOR PRODUCING A CATALYST COMPRISING HEAT REACTING A NICKEL-CARBONYL-PHOSPHINE COMPLEX WITH AN UNPOLYMERIZABLE DISUBSTITUTED ACETYLENE TO PRODUCE A NICKELPHOSPHINE UNPOLYMERIZABLE ACETYLENE COMPLEX.
Claim 2
Dependent Claim
24 words
A PROCESS FOR PRODUCING A CATALYST COMPRISING HEAT REACTING A NICKEL-CARBONYL-PHOSPHINE COMPLEX WITH AN UNPOLYMERIZABLE DISUBSTITUTED ACETYLENE TO PRODUCE A NICKELPHOSPHINE UNPOLYMERIZABLE ACETYLENE COMPLEX.
Claim 3
Dependent Claim
54 words
AN IMPROVEMENT METHOD OF POLYMERIZING A POLYMERIZABLE ACETYLENE WHICH COMPRISES REFLUXING DICARBONYL-BIS(TRIS-(2-CYANOETHYL) PHOSPHINE) NICKEL REPRESENTED BY THE NI(CO)2(P(CH2CH2CN)3)2 WITH 2,5-DIMETHYL-3-HEXYNE2,5-DIOL IN BENZENE AND SUBSEQUENTLY ADDING THE POLYMERIZABLE ACETYLENE TO BE POLYMERIZED WHEREIN SAID POLYMERIZABLE ACETYLENE HAS AT LEAST ONE HYDROGEN ATOM ATTACHED TO AN ACETYLENIC CARBON ATOM IN THE MOLECULE OF SAID POLYMERIZABLE ACETYLENE.
Claim 4
Dependent Claim
54 words
AN IMPROVEMENT METHOD OF POLYMERIZING A POLYMERIZABLE ACETYLENE WHICH COMPRISES REFLUXING DICARBONYL-BIS(TRIS-(2-CYANOETHYL) PHOSPHINE) NICKEL REPRESENTED BY THE NI(CO)2(P(CH2CH2CN)3)2 WITH 2,5-DIMETHYL-3-HEXYNE2,5-DIOL IN BENZENE AND SUBSEQUENTLY ADDING THE POLYMERIZABLE ACETYLENE TO BE POLYMERIZED WHEREIN SAID POLYMERIZABLE ACETYLENE HAS AT LEAST ONE HYDROGEN ATOM ATTACHED TO AN ACETYLENIC CARBON ATOM IN THE MOLECULE OF SAID POLYMERIZABLE ACETYLENE.
References Cited (Backward Citations)
US2274988A
Cited
US2542417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |