US2985626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High melting copolyamides from omegaaminocarboxylic acids, terephthalic acid and 1, 4-cyclohexanebis
Assignee: Eastman Kodak Co
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Filing: 1957-01-24
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Granted: 1961-05-23
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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
2026-10-24 06:51
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A LINEAR HIGHLY POLYMERIC COPOLYAMIDE HAVING A MELTING POINT OF FROM ABOUT 220* TO ABOUT 300*C. OF FROM 85 TO 50 MOLE PROPORTIONS OF AN ALIPHATIC BIFUNCTIONAL OMEGA-AMINOCARBOXYLIC ACILD CONTAINING FROM 5 TO 12 CARBON ATOMS, FROM 15 TO 50 MOLE PROPORTIONS OF TEREPHTHALIC ACILD AND A CORRESPONDING NUMBER OF MOLE PROPORTIONS SUBSTANTIALLY EQUAL TO THE MOLE PROPORTIONS OF TEREPHTHALIC ACID OF A BIFUNCTIONAL DIAMINE SELECTED FROM THE GROUP CONSISTING OF TRANS-1,4-CYCLOHEXANEBIS(METHYLAMINE) AND CIS-1,4-CYCLOHEXANEBIS (METHYLAMINE).
Claim 2
Dependent Claim
75 words
A LINEAR HIGHLY POLYMERIC COPOLYAMIDE HAVING A MELTING POINT OF FROM ABOUT 220* TO ABOUT 300*C. OF FROM 85 TO 50 MOLE PROPORTIONS OF AN ALIPHATIC BIFUNCTIONAL OMEGA-AMINOCARBOXYLIC ACILD CONTAINING FROM 5 TO 12 CARBON ATOMS, FROM 15 TO 50 MOLE PROPORTIONS OF TEREPHTHALIC ACILD AND A CORRESPONDING NUMBER OF MOLE PROPORTIONS SUBSTANTIALLY EQUAL TO THE MOLE PROPORTIONS OF TEREPHTHALIC ACID OF A BIFUNCTIONAL DIAMINE SELECTED FROM THE GROUP CONSISTING OF TRANS-1,4-CYCLOHEXANEBIS(METHYLAMINE) AND CIS-1,4-CYCLOHEXANEBIS (METHYLAMINE).
References Cited (Backward Citations)
US2130523A
Cited
US2130948A
Cited
US2241321A
Cited
US2252555A
Cited
FR873983A
Cited
US2625536A
Cited
FR1112203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |