US4946937A
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Vinylene copolymer
Assignee: Bayer AG
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Filing: 1989-08-09
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Granted: 1990-08-07
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Expires: 2009-08-09
Abstract
Abstract Vinylene copolymers composed of recurrent structural units of formula I ##STR1## wherein Ar denotes an aromatic or heterocyclic group, R denotes an inert substituent and n stands for an integer with a value from 0-8 and processes for their preparation.
Inventors
- 👤 Walter Heitz
- 👤 Andreas Greiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:09
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A polymer composed of recurrent structural units of formula (I) ##STR16## wherein Ar denotes a phenylene group, R denotes a fluoroalkyl group with 1 to 4 carbon atoms and n denotes 1 or 2.
Claim 2
Dependent Claim
34 words
A polymer composed of recurrent structural units of formula (I) ##STR16## wherein Ar denotes a phenylene group, R denotes a fluoroalkyl group with 1 to 4 carbon atoms and n denotes 1 or 2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |