US3598864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bisphenol poly(ester-amides)
Assignee: Eastman Kodak Co
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Filing: 1969-08-20
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Granted: 1971-08-10
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Expires: 1989-08-20
Abstract
Abstract POLY(ESTER-AMIDE) COPOLYMERS DERIVED FROM BISPHENOLS, AROMATIC DICARBOXYLIC ACIDS AND AROMATIC AMINO ACIDS HAVE BEEN FOUND TO EXHIBIT IMPROVED SOLVENT RESISTANCE, STRESS CRACKING RESISTANCE AND ALSO INCREASED STIFFNESS, TENSILE STRENGTH, HARDNESS AND HEAT DISTORTION TEMPERATURE.
Inventors
- 👤 John R Caldwell
- 👤 Winston J Jackson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:40
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |