US3329657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water soluble cross linked cationic polyamide polyamines
Assignee: Wyeth Holdings LLC
•
Filing: 1963-05-17
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Granted: 1967-07-04
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Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 Strazdins Edward
- 👤 House Ronald Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:58
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55; C; C08; C08G; C08G69/00; C08G69/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A WATER-SOLUBLE STORAGE-STABLE CROSS-LINKED CATIONIC POLYMER PREPARED BY SUBSTANTIALLY COMPLETELY REACTING ALL THE FUNCTIONALITIES OF A CROSS-LINKING AGENT WITH A WATER-SOLUBLE SUBSTANTIALLY LINEAR POLYAMIDEPOLYAMINE, THE AMOUNT OF SAID CROSS-LINKING AGENT BEING SUFFICIENT TO FORM A POLYMER WHICH IS CROSS-LINKED YET WATER-SOLUBLE AND WHICH, AS A 35% BY WEIGHT SOLUTION IN WATER AT 80*C., HAS A VISCOSITY OF AT LEAST 50 CENTIPOISES, THE AMOUNT OF SAID CROSS-LINKING AGENT BEING IN EXCESS OF ABOUT 0.01 MOL PER AMINO GROUP IN SAID POLYAMIDEPOLYAMINE.
Claim 2
Dependent Claim
80 words
A WATER-SOLUBLE STORAGE-STABLE CROSS-LINKED CATIONIC POLYMER PREPARED BY SUBSTANTIALLY COMPLETELY REACTING ALL THE FUNCTIONALITIES OF A CROSS-LINKING AGENT WITH A WATER-SOLUBLE SUBSTANTIALLY LINEAR POLYAMIDEPOLYAMINE, THE AMOUNT OF SAID CROSS-LINKING AGENT BEING SUFFICIENT TO FORM A POLYMER WHICH IS CROSS-LINKED YET WATER-SOLUBLE AND WHICH, AS A 35% BY WEIGHT SOLUTION IN WATER AT 80*C., HAS A VISCOSITY OF AT LEAST 50 CENTIPOISES, THE AMOUNT OF SAID CROSS-LINKING AGENT BEING IN EXCESS OF ABOUT 0.01 MOL PER AMINO GROUP IN SAID POLYAMIDEPOLYAMINE.
References Cited (Backward Citations)
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Cited
GB804504A
Cited
US2926154A
Cited
US3084092A
Cited
US3125552A
Cited
US3215654A
Cited
US3197427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |