US3723388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenoxyphthalate polyesters
Assignee: Eastman Kodak Co
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Filing: 1971-10-08
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Granted: 1973-03-27
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Expires: 1991-10-08
Abstract
Abstract COMPOSITION OF MATTER COMPRISING A PHENOXYPHTHALATE POLYESTER OF AT LEAST ONE AROMATIC DIOL, AND AT LEAST IN PART AT LEAST ONE PHENOXYPHTHALIC ACID. THESE POLYESTERS ARE CHARACTERIZED BY THEIR REDUCED GLASS TRANSITION TEMPERATURES, THERMAL AND OXIDATIVE STABILITY AND HIGH OXYGEN INDICES WHICH MAKES THE COMPOSITIONS READILY PROCESSABLE INTO FIRE-RETARDANT PLASTICS AND FIBERS.
Inventors
- 👤 A Bell
- 👤 W Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:59
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |