Patent US3074918A successfully refreshed from Google Patents.
US3074918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of cyclic olefins
Assignee: EIDP Inc
•
Filing: 1957-06-20
•
Granted: 1963-01-22
•
Expires: 1977-06-20
Abstract
No abstract record available.
Inventors
- 👤 Eleuterio Herbert Sousa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:06
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR POLYMERIZING CYCLIC OLEFINS WHICH COMPRISES CONTACTING A CYCLIC OLEFIN HAVING AT LEAST ONE UNSUBSTITUTED ETHLYLENIC RING DOUBLE BOND AND NOT MORE THAN ONE THLYLENIC DOUBLE BOND IN EACH RING STRUCTURE WITH A CATALYST PREPARED BY ADMIXING A HYDRIDE OF A METAL SELECTED FROM GEOUP T TO III OF THE HYDRIDE OF A OF ELEMENTS WITH AN OXIDE OF A METAL OF GROUP VI-B OF THE PERIODIC TABLES OF ELEMENTS SUPPORTED ON A DIFFICUTLY REDUCIBLE METAL OXIDE AND SEPARATING FROM THE RESULTING MIXTURE A SOLID POLYMERIC HUDROCARBON FORMED BY RING OPENING.
Claim 2
Dependent Claim
93 words
A PROCESS FOR POLYMERIZING CYCLIC OLEFINS WHICH COMPRISES CONTACTING A CYCLIC OLEFIN HAVING AT LEAST ONE UNSUBSTITUTED ETHLYLENIC RING DOUBLE BOND AND NOT MORE THAN ONE THLYLENIC DOUBLE BOND IN EACH RING STRUCTURE WITH A CATALYST PREPARED BY ADMIXING A HYDRIDE OF A METAL SELECTED FROM GEOUP T TO III OF THE HYDRIDE OF A OF ELEMENTS WITH AN OXIDE OF A METAL OF GROUP VI-B OF THE PERIODIC TABLES OF ELEMENTS SUPPORTED ON A DIFFICUTLY REDUCIBLE METAL OXIDE AND SEPARATING FROM THE RESULTING MIXTURE A SOLID POLYMERIC HUDROCARBON FORMED BY RING OPENING.
References Cited (Backward Citations)
US1903500A
Cited
US2731452A
Cited
US2831037A
Cited
US2721189A
Cited
US2799688A
Cited
US2850488A
Cited
US2910461A
Cited
US2932630A
Cited
US2868771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |