Patent US3169526A successfully refreshed from Google Patents.
US2647105A
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Process of polymerizing epsiloncaprolactam
Assignee: EIDP Inc
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Filing: 1951-09-26
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Granted: 1953-07-28
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Expires: 1971-09-26
Abstract
No abstract record available.
Inventors
- 👤 Harold R Mighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:48
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS FOR PRODUCING POLYAMIDE WHICH COMPRISES POLYMERIZING EPSILON-CAPROLACTAM IN THE PRESENCE OF A CATALYTIC AMOUNT OF AN ALKALI METAL HYDRIDE.
Claim 2
Dependent Claim
21 words
A PROCESS FOR PRODUCING POLYAMIDE WHICH COMPRISES POLYMERIZING EPSILON-CAPROLACTAM IN THE PRESENCE OF A CATALYTIC AMOUNT OF AN ALKALI METAL HYDRIDE.
References Cited (Backward Citations)
US1838234A
Cited
US2251519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |