Patent US3929635A successfully refreshed from Google Patents.
US3929635A
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Use of polymeric quaternary ammonium betaines as water clarifiers
Assignee: Baker Petrolite LLC
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Filing: 1974-03-19
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Granted: 1975-12-30
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Expires: 1994-03-19
Abstract
Abstract Polymeric quaternary ammonium betaines; the preparation thereof; and uses therefor. These are illustrated by polymers and copolymers of dicarboxylic anhydrides such as maleic anhydride and copolymers thereof derived from copolymerizable compounds such as olefins, vinyl compounds, etc.; a carboxylic acid group of the anhydride polymeric unit being esterified with a quaternary alkanolamine. The polymers are prepared by reacting the anhydride-containing polymer with an alkylene oxide and a tertiary amine to form quaternary alkanolamine esters.
Inventors
- 👤 Rudolf S Buriks
- 👤 Allen R Fauke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:31
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/105; G03G5/107; A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8164; A61Q; A61Q5/00; A61Q5/06; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; B01D71/00; B01D71/06; B01D71/40; B01D71/403; C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C02F5/00; C02F5/08; C02F5/10; C02F5/12; C08; C08F; C08F8/00; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
35 words
The process of water clarification which comprises treating an aqueous system with an effective amount of a polymeric quaternary ammonium betaine which has no anions and is a polymer derived from a dicarboxylic acid anhydride.
Claim 2
Dependent Claim
35 words
The process of water clarification which comprises treating an aqueous system with an effective amount of a polymeric quaternary ammonium betaine which has no anions and is a polymer derived from a dicarboxylic acid anhydride.
Claim 3
Dependent Claim
19 words
THE PROCESS OF CLAIM 1 WHERE THE POLYMERIC QUARTERNARY AMMONIUM BETAIN WHICH HAS NO ANIONS HAS THE REPEATING UNIT
Claim 4
Dependent Claim
11 words
The process of claim 2 where the polymeric quaternary ammonium betaine
Claim 5
Dependent Claim
11 words
The process of claim 2 where the polymeric quaternary ammonium betaine
Claim 6
Dependent Claim
20 words
The process of claim 2 where the polymeric quaternary ammonium betaine which has no anions is diisobutylene-maleic anhydride-trimethyl amine-propylene oxide.
Claim 7
Dependent Claim
20 words
The process of claim 2 where the polymeric quaternary ammonium betaine which has no anions is ethylene-maleic anhydridetrimethyl amine-ethylene oxide.
Claim 8
Dependent Claim
34 words
A process of water clarification which comprises dispersing throughout an aqueous system containing suspended particles an effective amount of a polymeric quaternary ammonium betaine which has no anions and which has the repeating unit
Claim 9
Dependent Claim
34 words
A process of water clarification which comprises dispersing throughout an aqueous system containing suspended particles an effective amount of a polymeric quaternary ammonium betaine which has no anions and which has the repeating unit
Claim 10
Dependent Claim
20 words
The process of claim 7 where the polymeric quaternary ammonium betaine which has no anions is styrene-maleic anhydride-trimethyl amine-ethylene oxide.
Claim 11
Dependent Claim
20 words
The process of claim 7 where the polymeric quaternary ammonium betaine which has no anions is diisobutylene-maleic anhydride-trimethyl amine-ethylene oxide.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |