US3243398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous paper sizing composition containing styrene-maleic anhydride compolymer saltand polyvinyl alcohol
Assignee: Monsanto Co
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Filing: 1961-05-29
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Granted: 1966-03-29
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Francis A Bonzagni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:39
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; D21H17/43; C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C08L35/00; C08L35/06; D21H17/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AN AQUEOUS SOLUTION HAVING IN ADMIXTURE 1-20 WEIGHT PERCENT OF A CELLULOSIC PAPER SIZING COMPOSITION SELECTED FROM THE GROUP CONSISTING OF THE AMMONIUM, AMINE AND ALKALI METAL SALTS OF 95-40 PARTS BY WEIGHT OF A STYRENE-MALEIC ANHYDRIDE COPOLYMER HAVING A SPECIFIC VISCOSITY OF 2-5 AND CORRESPONDINGLY 5-60 PARTS BY WEIGHT OF A POLYVINYL ALCOHOL HAVING A VISCOSITY OF 40-60 CENTIPOISES AT 20*C.; SAID SOLUTION HAVING A PH OF 5-9.
Claim 2
Dependent Claim
69 words
AN AQUEOUS SOLUTION HAVING IN ADMIXTURE 1-20 WEIGHT PERCENT OF A CELLULOSIC PAPER SIZING COMPOSITION SELECTED FROM THE GROUP CONSISTING OF THE AMMONIUM, AMINE AND ALKALI METAL SALTS OF 95-40 PARTS BY WEIGHT OF A STYRENE-MALEIC ANHYDRIDE COPOLYMER HAVING A SPECIFIC VISCOSITY OF 2-5 AND CORRESPONDINGLY 5-60 PARTS BY WEIGHT OF A POLYVINYL ALCOHOL HAVING A VISCOSITY OF 40-60 CENTIPOISES AT 20*C.; SAID SOLUTION HAVING A PH OF 5-9.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |