Patent US3233962A successfully refreshed from Google Patents.
US3233962A
Expired / Lapsed
US
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Method of treating cellulose fibers and composition resulting therefrom
Assignee: Dennison Manufacturing Co
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Filing: 1961-06-20
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Granted: 1966-02-08
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Expires: 1981-06-20
Abstract
No abstract record available.
Inventors
- 👤 George R Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:44
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/30; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A SIZED SHEET OF FLEXIBLE PAPER HAVING ENHANCED WET STRENGTH COMPRISING A SHEET OF CELLULOCIS FIBERS COATED WITH THE REACTION PRODUCT OF AT LEAST ONE POLYAMIDE RESIN WHICH IS THE CONDENSATION PRODUCT OF AT LEAST ONE POLYMERIC POLYENE FAT ACID AND AT LEAST ONE POLYAMINE, SAID POLYAMIDE RESIN HAVING AN AMINE NUMBER OF AT LEAST 3, AND A POLYISOCYANATE REACTIVE WITH SAID RESIN, SAID COATED PAPER HAVING DRY STRENGTH AND FLEXIBILITY PROPERTIES SUBSTANTIALLY AS GREAT AS UNCOATED PAPER.
Claim 2
Dependent Claim
78 words
A SIZED SHEET OF FLEXIBLE PAPER HAVING ENHANCED WET STRENGTH COMPRISING A SHEET OF CELLULOCIS FIBERS COATED WITH THE REACTION PRODUCT OF AT LEAST ONE POLYAMIDE RESIN WHICH IS THE CONDENSATION PRODUCT OF AT LEAST ONE POLYMERIC POLYENE FAT ACID AND AT LEAST ONE POLYAMINE, SAID POLYAMIDE RESIN HAVING AN AMINE NUMBER OF AT LEAST 3, AND A POLYISOCYANATE REACTIVE WITH SAID RESIN, SAID COATED PAPER HAVING DRY STRENGTH AND FLEXIBILITY PROPERTIES SUBSTANTIALLY AS GREAT AS UNCOATED PAPER.
References Cited (Backward Citations)
GB153663A
Cited
US2303364A
Cited
US2333914A
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US2374136A
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GB579340A
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GB696029A
Cited
US2710816A
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US3084092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |