Patent US2631993A successfully refreshed from Google Patents.
US2631993A
Expired / Lapsed
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Insolubilization of polycarbonamides containing tertiary nitrogen in the chains
Assignee: EIDP Inc
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Filing: 1947-09-16
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Granted: 1953-03-17
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Expires: 1967-09-16
Abstract
No abstract record available.
Inventors
- 👤 Paul W Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD OF INSOLUBILIZING A LINEAR POLYCARBONAMIDE CONTAINING, AS LINKS IN THE POLYMER CHAIN, TERTIARY NITROGEN ATOMS WHICH COMPRISES CROSS-LINKING SAID POLYAMIDE BY TREATING SAID POLYAMIDE WITH A POLYFUNCTIONAL, HALOGEN CONTAINING CROSS-LINKING AGENT CONTAINING A PLURALITY OF GROUPS REACTIVE TO FROM QUATERNARY AMMONIUM LINKAGES, AND REACTING SAID TERTIARY NITROGEN GROUPS IN SAID POLYAMIDE WITH SAID REACTIVE GROUPS IN SAID AGENT TO PRODUCE A RESULTANT POLYMER WHICH CONTAINS SAID LINKAGES AS CROSS-LINKS AND WHICH IS INSOLUBLE IN SOLVENTS FOR THE UNMODIFIED POLYAMIDE.
Claim 2
Independent Claim
81 words
A METHOD OF INSOLUBILIZING A LINEAR POLYCARBONAMIDE CONTAINING, AS LINKS IN THE POLYMER CHAIN, TERTIARY NITROGEN ATOMS WHICH COMPRISES CROSS-LINKING SAID POLYAMIDE BY TREATING SAID POLYAMIDE WITH A POLYFUNCTIONAL, HALOGEN CONTAINING CROSS-LINKING AGENT CONTAINING A PLURALITY OF GROUPS REACTIVE TO FROM QUATERNARY AMMONIUM LINKAGES, AND REACTING SAID TERTIARY NITROGEN GROUPS IN SAID POLYAMIDE WITH SAID REACTIVE GROUPS IN SAID AGENT TO PRODUCE A RESULTANT POLYMER WHICH CONTAINS SAID LINKAGES AS CROSS-LINKS AND WHICH IS INSOLUBLE IN SOLVENTS FOR THE UNMODIFIED POLYAMIDE.
References Cited (Backward Citations)
GB493592A
Cited
US2218739A
Cited
US2314972A
Cited
US2363614A
Cited
US2309575A
Cited
US2561814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |