US2916476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides of xylenediamine and an aliphatic dibasic acid up-graded with 1, 4-cyclohexanebis
Assignee: Eastman Kodak Co
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Filing: 1956-10-24
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Granted: 1959-12-08
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Expires: 1976-10-24
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Gilkey Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:38
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A LINEAR HIGHLY POLYMERIC FIBER-FORMING COPOLYAMIDS OF (1) A MIXTURE OF AMINES COMPOSED OF (A) 90 TO 50 MOLE PERCENT OF SAID MIXTURE OF A XYLENE-A,A'' -DIAMINE, AT LEAST HALF THEREOF BEING THE META ISOMER, ANY BALANCE BEING THE PARA ISOMER, AND (B) 10 TO 50 MOLE PERCENT OF SAID MIXTURE OF 1,4-CYCOHEXANEBIS(METHYLAMINE) WITH (2) A SATURATED ALIPHATIC DICARBOXY COMPOUND CONTAINING FROM ABOUT 6 TO ABOUT 12 CARBON ATOMS, WHICH COPOLYAMIDE IS CHARACTERIZED BY AN INCREASED MELTING POINT CONTRIBUTED TO THE PROPERTIES OF THE COPOLYAMIDE BY SAID 1,4-CYCLOHEXANE BIS(METHYLAMINE).
Claim 2
Dependent Claim
89 words
A LINEAR HIGHLY POLYMERIC FIBER-FORMING COPOLYAMIDS OF (1) A MIXTURE OF AMINES COMPOSED OF (A) 90 TO 50 MOLE PERCENT OF SAID MIXTURE OF A XYLENE-A,A'' -DIAMINE, AT LEAST HALF THEREOF BEING THE META ISOMER, ANY BALANCE BEING THE PARA ISOMER, AND (B) 10 TO 50 MOLE PERCENT OF SAID MIXTURE OF 1,4-CYCOHEXANEBIS(METHYLAMINE) WITH (2) A SATURATED ALIPHATIC DICARBOXY COMPOUND CONTAINING FROM ABOUT 6 TO ABOUT 12 CARBON ATOMS, WHICH COPOLYAMIDE IS CHARACTERIZED BY AN INCREASED MELTING POINT CONTRIBUTED TO THE PROPERTIES OF THE COPOLYAMIDE BY SAID 1,4-CYCLOHEXANE BIS(METHYLAMINE).
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) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |