US3631010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of transpolypentenamers
Assignee: Bayer AG
•
Filing: 1969-05-09
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Granted: 1971-12-28
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Expires: 1989-05-09
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF CYCLOPENTENE-POLYMERS HAVING PREDOMINANTLY TRANSCONFIGURATION BY THE POLYMERISATION OF CYCLOPENTENE IN SOLUTION IN INERT SOLVENT IN THE PRESENCE OF A MIXED CATALYST OF (A) A TUNGSTEN SALT, (B) A HALOGENATED ALCOHOL IN WHICH THE HALOGEN ATOM AND THE HYDROXYL GROUP ARE ATTACHED TO ADJACENT CARBON ATOMS, AND/OR A HALOGENATED PHENOL, AND (C) AN ORGANIC ALUMINIUM COMPOUND, IN THE MOLAR RATIO OF A:B:C OF 1:0.3 TO 10:0.5 TO 15.
Inventors
- 👤 Josef Witte
- 👤 Nikolaus Schon
- 👤 Gottfried Pampus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:24
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |