US3192191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homopolymers and process of preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1961-03-21
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Granted: 1965-06-29
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Expires: 1981-03-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Leto
- 👤 Lila M Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:49
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR PREPARING A HOMOPOLYMER OF BICYCLO(2,2,1)-HEPTA-(I,5)-DIENE WHICH DOES NOT MELT AT TEMPERATURES UP TO ABOUT 350*C. AT ATMOSPHERIC PRESSURE, COMPRISING POLYMERIZING BICYCLO (2,21)-HEPTA(2,5)-DIENE IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF BICYCLOHEPTADIENE MOLYBDENUM TETRACARBONYL, BICYCLOHEPTADIENE TUNGSTEN TETRACARBONYL, CYCLOHEPTATRIENE MOLYBDENUM TRICARBONYL AND CYCLOHEPTATRIENE TUNGSTEN TRICARBONYL AT A TEMPERATURE BETWEEN ABOUT 25*C. AND REFLUX FOR A PERIOD OF TIME OF AT LEAST 4 HOURS.
Claim 2
Dependent Claim
68 words
A PROCESS FOR PREPARING A HOMOPOLYMER OF BICYCLO(2,2,1)-HEPTA-(I,5)-DIENE WHICH DOES NOT MELT AT TEMPERATURES UP TO ABOUT 350*C. AT ATMOSPHERIC PRESSURE, COMPRISING POLYMERIZING BICYCLO (2,21)-HEPTA(2,5)-DIENE IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF BICYCLOHEPTADIENE MOLYBDENUM TETRACARBONYL, BICYCLOHEPTADIENE TUNGSTEN TETRACARBONYL, CYCLOHEPTATRIENE MOLYBDENUM TRICARBONYL AND CYCLOHEPTATRIENE TUNGSTEN TRICARBONYL AT A TEMPERATURE BETWEEN ABOUT 25*C. AND REFLUX FOR A PERIOD OF TIME OF AT LEAST 4 HOURS.
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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |