US3332834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming dry strength paper with cationic resin, polyacrylamide resin and alum complex and paper thereof
Assignee: Wyeth Holdings LLC
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Filing: 1966-05-25
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Granted: 1967-07-25
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Expires: 1986-05-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter Florus Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:47
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/66; D21H17/20; D21H17/33; D21H17/34; D21H17/37; D21H17/375; D21H17/46; D21H17/54; D21H17/55; D21H21/00; D21H21/14; D21H21/18; D21H23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A PROCESS FOR THE MANUFACTURE OF HIGH DRY-STRENGTH PAPER HAVING SUBSTANTIALLY NO WET STRENGTH, WHICH COMPRISES ADDING A WATER-SOLUBLE ANIONIC DRY STRENGTH VINYL POLYMER AT LEAST 80 MOL PERCENT COMPOSED OF
Claim 2
Dependent Claim
31 words
A PROCESS FOR THE MANUFACTURE OF HIGH DRY-STRENGTH PAPER HAVING SUBSTANTIALLY NO WET STRENGTH, WHICH COMPRISES ADDING A WATER-SOLUBLE ANIONIC DRY STRENGTH VINYL POLYMER AT LEAST 80 MOL PERCENT COMPOSED OF
References Cited (Backward Citations)
US2601597A
Cited
US2686121A
Cited
US2769711A
Cited
US2765229A
Cited
US2884058A
Cited
US3049469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |