Patent US3154528A successfully refreshed from Google Patents.
US3154528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vanadium polymerization catalyst and process of polymerizing therewith
Assignee: EIDP Inc
•
Filing: 1962-07-05
•
Granted: 1964-10-27
•
Expires: 1982-07-05
Abstract
No abstract record available.
Inventors
- 👤 Alfred P Kottenhahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:19
CPC Classifications
C; C08; C08F; C08F210/00; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
37 words
A PROCESS FOR PREPARING HIGH MOLECULAR WEIGHT HYDROCARBON POLYMERS WHIC COMPRISES CONTACTING THE POLYMERIZABLE MONOMERS WITH A POLYMERIZATION CATALYST OBTAINED BY MIXING VANADIUM TETRACHLORIDE WITH AN ORGANOMETALLIC COMPOUND HAVING A STRUCTURE SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
BE534792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |