US3580892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing cyclopentene
Assignee: Bayer AG
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Filing: 1969-11-05
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Granted: 1971-05-25
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Expires: 1989-11-05
Abstract
Abstract A CATALYST MADE FROM (1) A RHENIUM COMPOUND AND (2) AN ALUMINUM ORGANIC COMPOUND POLYMERISES CYCLOPENTENE TO YIELD RUBBER-LIKE PRODUCTS WITH HIGH CONTENT OF CIS-LINKAGES.
Inventors
- 👤 Peter Gunther
- 👤 Wolfgang Oberkirch
- 👤 Gottfried Pampus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:40
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |