Patent US2939862A successfully refreshed from Google Patents.
US2939862A
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Linear polyamides from ether-type diamines, 1, 4-cyclohexanedicarboxylic acid and an upgrading diamine
Assignee: Eastman Kodak Co
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Filing: 1957-01-24
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Granted: 1960-06-07
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Expires: 1977-01-24
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Gilkey Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:39
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/40; Y; Y10; Y10S; Y10S264/00; Y10S264/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PROCESS FOR PREPARING A COPOLYAMIDE COMPRISING HEATING ONE MOLE PROPORTION OF A TRANS-1,4-CYCLOHEXANE DICARBOXYLIC ACID, 1-X MOLE PROPORTIONS OF A BIFUNCTIONAL DIAMINE CONTAINING FROM 6 TO 20 CARBON ATOMS SELECTED FROM THE GROUP CONSISTING OF DIAMINES HAVING THE FOLLOWING FORMULAS:
Claim 2
Dependent Claim
41 words
A PROCESS FOR PREPARING A COPOLYAMIDE COMPRISING HEATING ONE MOLE PROPORTION OF A TRANS-1,4-CYCLOHEXANE DICARBOXYLIC ACID, 1-X MOLE PROPORTIONS OF A BIFUNCTIONAL DIAMINE CONTAINING FROM 6 TO 20 CARBON ATOMS SELECTED FROM THE GROUP CONSISTING OF DIAMINES HAVING THE FOLLOWING FORMULAS:
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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |