US4221886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agent for surface-sizing papers with maleic anhydride copolymers
Assignee: Novartis Corp
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Filing: 1978-10-31
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Granted: 1980-09-09
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Expires: 1998-10-31
Abstract
Abstract A composition for surface-sizing a paper is provided which contains a water soluble salt of a copolymer of (a) maleic anhydride and/or maleic acid (b) styrene (c) a vinyl alkyl ether, preferably n-butyl-vinyl ether or isobutyl vinyl ether which has been reacted with (d) a primary fatty amine such as palmitylamine, oleylamine or preferably stearylamine.
Inventors
- 👤 Rosemarie Topfl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:24
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; D21H17/43; C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
87 words
A composition for surface size of paper with maleic anhydride copolymer, which contains a water-soluble salt of a copolymer of (a) 40 to 50 mol % maleic anhydride and/or maleic acid, (b) 50 to 40 mol % of styrene and (c) 5 to 15 mol % of a vinyl alkyl ether having 3 to 8 carbon atoms in the alkyl radical, which has been reacted with (d) 0.15 to 0.30 mol per mol of component (a) of a primary fatty amine having 12 to 22 carbon atoms.
Claim 2
Dependent Claim
87 words
A composition for surface size of paper with maleic anhydride copolymer, which contains a water-soluble salt of a copolymer of (a) 40 to 50 mol % maleic anhydride and/or maleic acid, (b) 50 to 40 mol % of styrene and (c) 5 to 15 mol % of a vinyl alkyl ether having 3 to 8 carbon atoms in the alkyl radical, which has been reacted with (d) 0.15 to 0.30 mol per mol of component (a) of a primary fatty amine having 12 to 22 carbon atoms.
Claim 3
Dependent Claim
15 words
A composition according to claim 1, which is in the form of an aqueous solution.
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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |