US4001193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anionic sizes
Assignee: Bayer AG
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Filing: 1974-01-28
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Granted: 1977-01-04
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Expires: 1994-01-28
Abstract
Abstract Improved anionic sizes of alkali metal or ammonium salts of copolymers of 0.5- 50% by weight of an aliphatic or cycloaliphatic half ester of α,β-monoolefinisch unsaturated dicarboxylic acids, 6-40% by weight of acrylic and/or methacrylic acid and 40-85% by weight of an aromatic monovinyl compound such as styrene.
Inventors
- 👤 Wulf von Bonin
- 👤 Friedhelm Muller
- 👤 Nikolaus Schon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:32
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; D21H17/43; C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C09; C09J; C09J135/00; C09J135/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A copolymer, which is suitable for use in anionic sizes, which is an ammonium or alkali metal salt of a copolymer consisting of a. 0.5 to 50% by weight of copolymerized units of at least one half ester of an α,β-olefinically unsaturated C 4 or C 5 dicarboxylic acid and an aliphatic or cycloaliphatic alcohol having 1 to 18 C-atoms, b. 6 to 40% by weight of copolymerized units of at least one acid selected from the group consisting of acrylic acid and methacrylic acid and c. 40 to 85% by weight of copolymerized units of an aromatic compound which contains a single polymerizable double bond.
Claim 2
Dependent Claim
106 words
A copolymer, which is suitable for use in anionic sizes, which is an ammonium or alkali metal salt of a copolymer consisting of a. 0.5 to 50% by weight of copolymerized units of at least one half ester of an α,β-olefinically unsaturated C 4 or C 5 dicarboxylic acid and an aliphatic or cycloaliphatic alcohol having 1 to 18 C-atoms, b. 6 to 40% by weight of copolymerized units of at least one acid selected from the group consisting of acrylic acid and methacrylic acid and c. 40 to 85% by weight of copolymerized units of an aromatic compound which contains a single polymerizable double bond.
Claim 3
Dependent Claim
17 words
A copolymer as claimed in claim 1 in which (a) is a maleic acid propyl half ester.
Claim 4
Dependent Claim
12 words
A copolymer as claimed in claim 1 in which (c) is styrene.
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) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |