US3790537A
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Polymers containing cyclo-1,1-diallylguanidine linkages and wet strength paper having a content thereof
Assignee: Wyeth Holdings LLC
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Filing: 1971-01-18
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Granted: 1974-02-05
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Expires: 1991-01-18
Abstract
Abstract WATER-SOLUBLE POLYMERS ARE PREPARED BY HOMOPOLYMERIZING 1,1-DIALLYLGUANIDINE OR BY COPOLYMERIZING 1,1DIALLYLGUANIDINE. THE RESULTING POLYMERS ARE CATIONIC AND ARE FLOCCULATING AGENTS. WHEN GLYOXYLATED (BY REACTION WITH GLYOXAL) THEY ARE WATER-SOLUBLE CATIONIC THERMOSETTING WET STRENGTH AGENTS FOR PAPER. WET STRENGTH PAPER CONTAINING THIS POLYMER RAPIDLY LOSES ITS WET STRENGTH ON NORMAL WEATHERING.
Inventors
- 👤 H Panzer
- 👤 L Mcadams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:35
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/45; D21H17/455; C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08F; C08F120/00; C08F120/02; C08F120/04; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/56; D21H17/37; D21H17/38; D21H21/00; D21H21/14; D21H21/18; D21H21/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |