Patent US2977341A successfully refreshed from Google Patents.
US2977341A
Expired / Lapsed
US
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Polymers of vinyl pyridinium betaines
Assignee: Wyeth Holdings LLC
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Filing: 1955-04-13
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Granted: 1961-03-28
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Expires: 1975-04-13
Abstract
No abstract record available.
Inventors
- 👤 Walter H Schuller
- 👤 John A Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:34
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/08; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PRODUCT COMPRISING A COPOLYMER OF MORE THAN TWO COMONOMERS, ONE OF WHICH IS (A) ACRYLONITRILE, (B) ANOTHER OF WHICH IS A BETAINE SELECTED FROM THE CLASS CONSISTING OF 1-CARBOXYMETHYL-2-METHYL-5-VINYLPYRIDINIUM BETAINE AND 1-CARBOXYETHYL-2-METHYL-5-VINYLPRIDINIUM BETAINE, AND (C) AT LEAST ONE ADDITIONAL COMONOMER SELECTED FROM THE CLASS CONSISTING OF VINYL ACETATE AND ACRYLAMIDE, THE INGREDIENTS OF (A), (B) AND (C) BEING PRESENT IN THE UNPOLYMERIZED MIXTURE OF MONOMERS WITHIN THE FOLLOWING RANGES OF PERCENTAGE PROPORTIONS BY WEIGHT: ACRYLONITRILE OF (A) 84.9-90.0%, BETAINE OF (B), 3.07.55%, AND COMONOMER OF (C), 5.0-7.55%, THE SUM OF THE INGREDIENTS OF (A), (B) AND (C) TOTALING 100.0%.
Claim 2
Dependent Claim
100 words
A PRODUCT COMPRISING A COPOLYMER OF MORE THAN TWO COMONOMERS, ONE OF WHICH IS (A) ACRYLONITRILE, (B) ANOTHER OF WHICH IS A BETAINE SELECTED FROM THE CLASS CONSISTING OF 1-CARBOXYMETHYL-2-METHYL-5-VINYLPYRIDINIUM BETAINE AND 1-CARBOXYETHYL-2-METHYL-5-VINYLPRIDINIUM BETAINE, AND (C) AT LEAST ONE ADDITIONAL COMONOMER SELECTED FROM THE CLASS CONSISTING OF VINYL ACETATE AND ACRYLAMIDE, THE INGREDIENTS OF (A), (B) AND (C) BEING PRESENT IN THE UNPOLYMERIZED MIXTURE OF MONOMERS WITHIN THE FOLLOWING RANGES OF PERCENTAGE PROPORTIONS BY WEIGHT: ACRYLONITRILE OF (A) 84.9-90.0%, BETAINE OF (B), 3.07.55%, AND COMONOMER OF (C), 5.0-7.55%, THE SUM OF THE INGREDIENTS OF (A), (B) AND (C) TOTALING 100.0%.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |