Patent US3332834A successfully refreshed from Google Patents.
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 11:23
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
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US2686121A
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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 |