Patent US3786209A successfully refreshed from Google Patents.
Patent US3464191A successfully refreshed from Google Patents.
Patent US2568656A successfully refreshed from Google Patents.
US2568656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of an isoolefin and a vinyl cycloolefin
Assignee: Goodrich Corp
•
Filing: 1946-03-02
•
Granted: 1951-09-18
•
Expires: 1966-03-02
Abstract
No abstract record available.
Inventors
- 👤 Charles I Parrish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:17
CPC Classifications
C; C08; C08F; C08F10/00; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE METHOD OF PREPARING A SOLID SULFUR VULCANIZABLE COPOLYMER OF A MAJOR PROPORTION OF AN ISOOLEFIN AND A MINOR PROPORTION OF A VINYL CYCLOOLEFIN WHICH COMPRISES TREATING A HYDROCARBON MIXTURE CONTAINING 80 TO 99 PARTS BY WEIGHT OF AN ISOOLEFIN HAVING FROM 4 TO 5 CARBON ATOMS AND 1 TO 20 PARTS OF A VINYL CYCLOOLEFIN OF THE STRUCTURE
Claim 2
Independent Claim
59 words
THE METHOD OF PREPARING A SOLID SULFUR VULCANIZABLE COPOLYMER OF A MAJOR PROPORTION OF AN ISOOLEFIN AND A MINOR PROPORTION OF A VINYL CYCLOOLEFIN WHICH COMPRISES TREATING A HYDROCARBON MIXTURE CONTAINING 80 TO 99 PARTS BY WEIGHT OF AN ISOOLEFIN HAVING FROM 4 TO 5 CARBON ATOMS AND 1 TO 20 PARTS OF A VINYL CYCLOOLEFIN OF THE STRUCTURE
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) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |