Patent US3790544A successfully refreshed from Google Patents.
US3790544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of cycloalkenes
Assignee: Bayer AG
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Filing: 1972-02-09
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Granted: 1974-02-05
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Expires: 1992-02-09
Abstract
Abstract A PROCESS FOR THE POLYMERIZATION OF UNSATURATED ALICYCLIC COMPOUNDS, CHARACTERIZED IN THAT AT LEAST ONE CYCLIC OLEFINE HAVING 4, 5, 7 OR MORE RING CARBON ATOMS AND AT LEAST ONE OLEFINIC DOUBLE BOND IN THE RING IS POLYMERIZED IN THE PRESENCE OF A CATALYST SYSTEM CONSISTING OF (A) A SALT OF MOLYBDENUM OR TUNGSTEN, (B) AN ORGANOMETALLIC COMPOUND OF ALUMINUM AND (C) A LEWIS ACID OR AN ADDUCT OF A LEWIS ACID AND A LEWIS BASE AS CO-CATALYST AND THE CATALYST FOR THIS POLYMERIZATION.
Inventors
- 👤 D Maertens
- 👤 G Lehnert
- 👤 G Pampus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:46
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |