US2795573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension polymerization of vinyl acetate and crotonic acid
Assignee: Monsanto Chemicals Ltd
•
Filing: 1954-02-16
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Granted: 1957-06-11
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Expires: 1974-02-16
Abstract
No abstract record available.
Inventors
- 👤 Gerald R Barrett
- 👤 Jr Randolph Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:16
CPC Classifications
C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F218/08; C08F263/00; C08F263/02; C08F263/04; Y; Y10; Y10S; Y10S526/00; Y10S526/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS OF COPOLYMERIZING VINYL ACETATE AND CROTONIC ACID WHICH COMPRISES HEATING VINYL ACETATE AND CROTONIC ACID IN A MOL RATIO OF 0.9 TO 0.98:0.1 TO 0.02 IN AN AQUEOUS MEDIUM IN THE PRESENCE OF AN OIL-SOLUBLE PEROXIDE POLYMERIZATION CATALYST AND A WATER-SOLUBLE HETEROPOLYMER OF VINYL ACETATE, MALEIC ANHYDRIDE AND AN ALKYL ACID MALEATE, SAID HETEROPOLYMER CONTAINING AT LEAST 0.05 MOL OF COMBINED ALKYL ACID MALEATE PER MOL OF COMBINED VINYL ACETATE.
Claim 2
Dependent Claim
72 words
A PROCESS OF COPOLYMERIZING VINYL ACETATE AND CROTONIC ACID WHICH COMPRISES HEATING VINYL ACETATE AND CROTONIC ACID IN A MOL RATIO OF 0.9 TO 0.98:0.1 TO 0.02 IN AN AQUEOUS MEDIUM IN THE PRESENCE OF AN OIL-SOLUBLE PEROXIDE POLYMERIZATION CATALYST AND A WATER-SOLUBLE HETEROPOLYMER OF VINYL ACETATE, MALEIC ANHYDRIDE AND AN ALKYL ACID MALEATE, SAID HETEROPOLYMER CONTAINING AT LEAST 0.05 MOL OF COMBINED ALKYL ACID MALEATE PER MOL OF COMBINED VINYL ACETATE.
References Cited (Backward Citations)
US2263598A
Cited
US2486855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |