US3126353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of amide-like polycondensa-
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
•
Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:12
CPC Classifications
C; C08; C08G; C08G69/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE PRODUCTION OF AMIDE-LIKE POLYCONDENSATION PRODUCTS WHICH ARE INSOLUBLE IN METHANOL AND HAVE MELTING POINTS BETWEEN 180*C. AND 350*C. WHICH COMPRISES POLYCONDENSING A HYDROXYNITRILE OF THE FORMULA HO-R-CN, WHEREIN R REPRESENTS A SATURATED ALIPHATIC HYDROCARBON CHAIN OF FROM 2 TO 11 CARBON ATOMS, BY HEATING SAID HYDROXYNITRILE AT TEMPERATURES BETWEEN 50*C. AND 300*C. AND AT PRESSURES OF FROM 30 TO 250 ATMOSPHERES IN THE ABSENCE OF WATER AND OF SOLVENTS CONTAINING HYDROXY GROUPS AND IN THE PRESENCE OF AN INERT GAS.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE PRODUCTION OF AMIDE-LIKE POLYCONDENSATION PRODUCTS WHICH ARE INSOLUBLE IN METHANOL AND HAVE MELTING POINTS BETWEEN 180*C. AND 350*C. WHICH COMPRISES POLYCONDENSING A HYDROXYNITRILE OF THE FORMULA HO-R-CN, WHEREIN R REPRESENTS A SATURATED ALIPHATIC HYDROCARBON CHAIN OF FROM 2 TO 11 CARBON ATOMS, BY HEATING SAID HYDROXYNITRILE AT TEMPERATURES BETWEEN 50*C. AND 300*C. AND AT PRESSURES OF FROM 30 TO 250 ATMOSPHERES IN THE ABSENCE OF WATER AND OF SOLVENTS CONTAINING HYDROXY GROUPS AND IN THE PRESENCE OF AN INERT GAS.
References Cited (Backward Citations)
US2125851A
Cited
US2376334A
Cited
US2335997A
Cited
US2331671A
Cited
US2628216A
Cited
US2628218A
Cited
US2628217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |