Patent US2632699A successfully refreshed from Google Patents.
US2632699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of high wet strength paper
Assignee: Eastman Kodak Co
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Filing: 1950-06-17
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Granted: 1953-03-24
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Expires: 1970-06-17
Abstract
No abstract record available.
Inventors
- 👤 Jr William F Fowler
- 👤 Donald R Spear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:46
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/14; D21H17/15; D21H17/20; D21H17/33; D21H17/34; D21H17/35; D21H17/37; D21H17/41; D21H17/42; D21H17/43; D21H17/62; D21H17/63; D21H17/66
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
46 words
A COMPOSITION USEFUL FOR IMPARTING HIGH WET STRENGTH TO PAPER COMPRISING 1-5 PARTS OF AN ALKALI METAL SALT OF ABIETIC ACID, 1-20 PARTS OF A STYRENE-ALKYL ACRYLATE RESIN, THE ALKYL HAVING 3-6 CARBON ATOMS AND THE STYRENE BEING 40-75% THEREOF, AND 2-20 PARTS OF ALUMINUM CHLORIDE.
References Cited (Backward Citations)
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US2081889A
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US2216845A
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US2301998A
Cited
US2315675A
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US2338839A
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US2394289A
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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) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |