US2917490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides from norcamphaneaminocarboxylic acids
Assignee: Eastman Kodak Co
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Filing: 1958-01-16
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Granted: 1959-12-15
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Expires: 1978-01-16
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Jr Winston J Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:12
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A LINEAR CONDENSATION-TYPE POLYAMIDE OF BIFUNCTIONAL POLYAMIDE-FORMING CONSTITUENTS OF WHICH (1) AT LEAST 50 MOLE PERCENT IS AT LEAST ONE OF THE 2,5- AND 2,6-ISOMERS OF NORCAMPHANEAMINOCARBOXYLIC ACID AND OF WHICH (2) UP TO 50 MOLE PERCENT IS SELECTED FROM THE GROUP CONSISTING OF (A) A SATURATED ALIPHATIC AMINOCARBOXYLIC ACID HAVING FROM 5-11 CARBON ATOMS, (B) CAPROLACTAM, AND (C) EQUIMOLAR QUANTITIES OF A STAURATED DISCARBOXYLIC ACID HAVING FROM 4-11 CARBON ATOMS AND A SATURATED DIAMINE HAVING FROM 2-12 CARBON ATOMS, THE PROPORTION OF (1) AND (2) ABOVE BEING SUCH AS TO CONSTITUTE A LINEAR CONDENSATION-TYPE POLYAMIDE WHICH IS FIBER-FORMING AND MELTS AT FROM ABOUT 210* C. TO ABOUT 340* C.
Claim 2
Dependent Claim
110 words
A LINEAR CONDENSATION-TYPE POLYAMIDE OF BIFUNCTIONAL POLYAMIDE-FORMING CONSTITUENTS OF WHICH (1) AT LEAST 50 MOLE PERCENT IS AT LEAST ONE OF THE 2,5- AND 2,6-ISOMERS OF NORCAMPHANEAMINOCARBOXYLIC ACID AND OF WHICH (2) UP TO 50 MOLE PERCENT IS SELECTED FROM THE GROUP CONSISTING OF (A) A SATURATED ALIPHATIC AMINOCARBOXYLIC ACID HAVING FROM 5-11 CARBON ATOMS, (B) CAPROLACTAM, AND (C) EQUIMOLAR QUANTITIES OF A STAURATED DISCARBOXYLIC ACID HAVING FROM 4-11 CARBON ATOMS AND A SATURATED DIAMINE HAVING FROM 2-12 CARBON ATOMS, THE PROPORTION OF (1) AND (2) ABOVE BEING SUCH AS TO CONSTITUTE A LINEAR CONDENSATION-TYPE POLYAMIDE WHICH IS FIBER-FORMING AND MELTS AT FROM ABOUT 210* C. TO ABOUT 340* C.
References Cited (Backward Citations)
DE802158C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |