US3211807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining a blend of a polyamide and a poly(n-vinyl amide)
Assignee: EIDP Inc
•
Filing: 1962-04-03
•
Granted: 1965-10-12
•
Expires: 1982-04-03
Abstract
No abstract record available.
Inventors
- 👤 Gillies George Alexander
- 👤 Pamm Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:52
CPC Classifications
C; C08; C08L; C08L77/00; C08L77/04; C08L39/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR FORMING A HOMOGENEOUS BLEND OF A POLYAMIDE AND A POLY(N-VINYL AMIDE) WHICH COMPRISES DISSOLVING A POLY(N-VINYL AMIDE) IN A MOLTEN POLYAMIDEFORMING COMPOUND FROM THE CLASS CONSISTING OF AN AMINO ACID AND A LACTAM, SAID SYSTEM BEING NON-AQUEOUS AND THEREAFTER POLYMERIZING THE SAID POLYAMIDE-FORMING COMPOUND IN THE PRESENCE OF AN ALKALINE CATALYST AT A TEMPERATURE OF BETWEEN ABOUT 185*C. AND 300*C
Claim 2
Dependent Claim
63 words
A PROCESS FOR FORMING A HOMOGENEOUS BLEND OF A POLYAMIDE AND A POLY(N-VINYL AMIDE) WHICH COMPRISES DISSOLVING A POLY(N-VINYL AMIDE) IN A MOLTEN POLYAMIDEFORMING COMPOUND FROM THE CLASS CONSISTING OF AN AMINO ACID AND A LACTAM, SAID SYSTEM BEING NON-AQUEOUS AND THEREAFTER POLYMERIZING THE SAID POLYAMIDE-FORMING COMPOUND IN THE PRESENCE OF AN ALKALINE CATALYST AT A TEMPERATURE OF BETWEEN ABOUT 185*C. AND 300*C
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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |