US3931089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid compositions comprised of polymeric 2-acrylamido-2-methylpropanesulfonic acid as thickener
Assignee: General Mills Chemicals Inc
•
Filing: 1974-06-06
•
Granted: 1976-01-06
•
Expires: 1994-06-06
Abstract
Abstract Acid solutions having pH values of about 2 or below and containing a homopolymer of 2-acrylamido-2-methylpropanesulfonic acid or a salt of the homopolymer.
Inventors
- 👤 Curtis Lee Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/025; B; B01; B01J; B01J19/00; B01J19/06; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; C09K8/74; C11; C11D; C11D3/00; C11D3/0005; C11D3/0047; C11D3/16; C11D3/37; C11D3/3746; C11D3/3769; C11D3/3773; C11D7/00; C11D7/02; C11D7/04; C11D7/08; Y; Y10; Y10S; Y10S507/00; Y10S507/933
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
A composition of matter comprising water in an amount of at least 25% by weight of the composition, an acid selected from the mineral acids, the water soluble carboxylic acids containing one to four carbon atoms and mixtures thereof in an amount to produce a pH level of about 2 or below, and a thickener selected from a homopolymer and the alkali and alkaline earth metal salts of the homopolymer of 2-acrylamido-2-methylpropanesulfonic acid in an amount of about 0.05% to 5.0% by weight of the composition.
Claim 2
Dependent Claim
86 words
A composition of matter comprising water in an amount of at least 25% by weight of the composition, an acid selected from the mineral acids, the water soluble carboxylic acids containing one to four carbon atoms and mixtures thereof in an amount to produce a pH level of about 2 or below, and a thickener selected from a homopolymer and the alkali and alkaline earth metal salts of the homopolymer of 2-acrylamido-2-methylpropanesulfonic acid in an amount of about 0.05% to 5.0% by weight of the composition.
Claim 3
Dependent Claim
29 words
The composition of claim 1 wherein an alcohol containing two to three carbon atoms is included in an amount of about 5% to 10% by weight of the composition.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein the thickener is included in amounts of about 1% to 4% by weight of the composition.
Claim 5
Dependent Claim
27 words
The composition of claim 1 wherein the thickener is the homopolymer of 2-acrylamido-2-methylpropanesulfonic acid in an amount of about 1% to 4% by weight of the composition.
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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |