US3248353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylene polyamine resin
Assignee: Wyeth Holdings LLC
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Filing: 1963-05-17
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Granted: 1966-04-26
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Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 Coscia Anthony Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:41
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR MANUFACTURING A WATER-SOLUBLE CATIONIC CELLULOSE-SUBSTANTIVE CHEM-STABLE POLYMER OF CROSSLINKED LONG CHAIN CONFIGURATION, WHICH COMPRISES SUBSTANTIALLY COMPLETELY REACTING TO A POINT SHORT OF GELATION EPICHLOROHYDRIN WITH A MAJOR PROPORTION OF A WATERSOLUBLE BIFUNCTIONAL AMINE AS CHAIN-FORMING COMPONENT AND A MINOR PROPORTION OF A WATER-SOLUBLE POLYFUNCTIONAL AMINE HAVING A FUNCTIONALITY GREATER THAN 2 AS COMPONENT FORMING SECONDARY AMINE LINKAGES IN SAID CHAIN, THE RATIO OF THE FUNCTIONALITY OF SAID EPICHLOROHYDRIN TO THE TOTAL FUNCTIONALITY OF SAID AMINES BEING SUBSTANTIALLY 1:1.
Claim 2
Dependent Claim
81 words
A PROCESS FOR MANUFACTURING A WATER-SOLUBLE CATIONIC CELLULOSE-SUBSTANTIVE CHEM-STABLE POLYMER OF CROSSLINKED LONG CHAIN CONFIGURATION, WHICH COMPRISES SUBSTANTIALLY COMPLETELY REACTING TO A POINT SHORT OF GELATION EPICHLOROHYDRIN WITH A MAJOR PROPORTION OF A WATERSOLUBLE BIFUNCTIONAL AMINE AS CHAIN-FORMING COMPONENT AND A MINOR PROPORTION OF A WATER-SOLUBLE POLYFUNCTIONAL AMINE HAVING A FUNCTIONALITY GREATER THAN 2 AS COMPONENT FORMING SECONDARY AMINE LINKAGES IN SAID CHAIN, THE RATIO OF THE FUNCTIONALITY OF SAID EPICHLOROHYDRIN TO THE TOTAL FUNCTIONALITY OF SAID AMINES BEING SUBSTANTIALLY 1:1.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |