US4628125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monomers containing bis(trifluoromethyl)biphenylene radicals
Assignee: Polaroid Corp
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Filing: 1984-02-09
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Granted: 1986-12-09
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Expires: 2004-02-09
Abstract
Abstract A class of polyesters comprising recurring units having certain bis(trifluoromethyl)biphenylene radicals is disclosed. The polyesters exhibit favorable solubility properties in certain organic solvents so as to facilitate the production of the polyesters via polycondensation methods to film- and fiber-forming molecular weights. Monomeric compounds comprising a bis(trifluoromethyl)biphenylene radical and useful for the production of the polyesters are also disclosed.
Inventors
- 👤 Howard G. Rogers
- 👤 Russell A. Gaudiana
- 👤 Richard A. Minns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:27
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
The compound having the formula ##STR33##
Claim 2
Dependent Claim
6 words
The compound having the formula ##STR33##
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) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |