Patent US3458486A successfully refreshed from Google Patents.
US3458486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polymers from cyclic compounds
Assignee: Phillips Petroleum Co
•
Filing: 1964-09-04
•
Granted: 1969-07-29
•
Expires: 1984-09-04
Abstract
No abstract record available.
Inventors
- 👤 Gardner C Ray
- 👤 David A Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:17
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/0286; C08G75/0295
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2538941A
Cited
US2513188A
Cited
US2986582A
Cited
US3099643A
Cited
US3268504A
Cited
US3219638A
Cited
US3248325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |