Patent US4212820A successfully refreshed from Google Patents.
US4212820A
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Acrylamide or methacrylamide alkoxypropyl quaternary compounds
Assignee: Huntsman Corp
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Filing: 1979-04-23
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Granted: 1980-07-15
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Expires: 1999-04-23
Abstract
Abstract Covers a new composition of matter comprising an acrylamide or methacrylamide monomer characterized by the following structural formula: ##STR1## where R 1 is hydrogen or methyl, R 2 and R 3 are lower alkyl, R 4 is a linear or branched alkyl group containing 7-20 carbon atoms, X is an anion of an organic or mineral acid having a valence m and A is a divalent lower alkyl group.
Inventors
- 👤 Philip Hotchkiss
- 👤 Robert M. Gipson
- 👤 Edward C. Y. Nieh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:44
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/89
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
63 words
An acrylamide or methacrylamide alkoxypropyl quaternary characterized by the following structural formula: ##STR5## where R 1 is hydrogen or methyl, R 2 and R 3 are lower alkyl, R 4 is a linear or branched alkyl group containing 7-20 carbon atoms, X is an anion of an organic or mineral acid having a valence m and A is a divalent lower alkyl group.
Claim 2
Dependent Claim
63 words
An acrylamide or methacrylamide alkoxypropyl quaternary characterized by the following structural formula: ##STR5## where R 1 is hydrogen or methyl, R 2 and R 3 are lower alkyl, R 4 is a linear or branched alkyl group containing 7-20 carbon atoms, X is an anion of an organic or mineral acid having a valence m and A is a divalent lower alkyl group.
Claim 3
Dependent Claim
9 words
The quaternary of claim 1 where A is propylene.
Claim 4
Dependent Claim
10 words
The quaternary of claim 2 where R 1 is methyl.
Claim 5
Dependent Claim
13 words
The quaternary of claim 3 where R 2 and R 3 are methyl.
References Cited (Backward Citations)
US2810713A
Cited
US3170901A
Cited
US3878247A
Cited
US3957869A
Cited
US4031138A
Cited
US4134916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |