US2761834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonated methylol acrylamide polymers and their preparation
Assignee: Wyeth Holdings LLC
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Filing: 1952-06-20
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Granted: 1956-09-04
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Expires: 1972-06-20
Abstract
No abstract record available.
Inventors
- 👤 Suen Tzeng-Jineq
- 👤 Arthur M Schiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:54
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; C; C08; C08F; C08F8/00; C08F8/34; C09; C09K; C09K17/00; C09K17/40; C09K17/48; C09K8/00; C09K8/02; C09K8/03; C09K8/035; C09K8/04; C09K8/14; C09K8/18; C09K8/22; C09K8/24; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/285; D06M15/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A SYNTHETIC ANIONIC RESINOUS COMPOSITION COMPRISING THE PRODUCT OBTAINED BY TREATING THE HOMOPOLYMER OF THE REACTION PRODUCT OF AN ACRYLAMIDE COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
24 words
A SYNTHETIC ANIONIC RESINOUS COMPOSITION COMPRISING THE PRODUCT OBTAINED BY TREATING THE HOMOPOLYMER OF THE REACTION PRODUCT OF AN ACRYLAMIDE COMPOUND HAVING THE FORMULA
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) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |