US3686151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpolymers of diallylamine
Assignee: Hercules LLC
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Filing: 1971-01-18
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Granted: 1972-08-22
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Expires: 1991-01-18
Abstract
Abstract LINEAR TERPOLYMERS OF A DIALLYLAMINE, SULFUR DIOXIDE AND ACRYLAMIDE OR A LOWER ALKYL SUBSTITUTED ACRYLAMIDE ARE DESCRIBED. THE TERPOLYMERS ARE PRODUCED BY CYCLOPOLYMERIZING A SALT OF THE APPROPRIATE DIALLYLAMINE IN THE PRESENCE OF SULFUR DIOXIDE AND THE AMIDE USING A FREE RADICAL CATALYST. THE TERPOLYMERS ARE USEFUL AS TREATING AGENTS FOR PAPER AND TEXTILES AND AS INTERMEDIATES FOR THE FORMATION OF DERIVATIVES WHICH ARE THE RESINOUS REACTION PRODUCTS OF THE TERPOLYMER WITH AN EPIHALOHYDRIN OR AN ALDEHYDE.
Inventors
- 👤 Gerald I Keim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:58
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F226/00; C08F226/02; C08F226/04; Y; Y10; Y10S; Y10S526/00; Y10S526/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |