Patent US2592218A successfully refreshed from Google Patents.
US2592218A
Expired / Lapsed
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Copolymers of allyl acetamides
Assignee: Hercules Powder Co
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Filing: 1948-11-19
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Granted: 1952-04-08
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Expires: 1968-11-19
Abstract
No abstract record available.
Inventors
- 👤 Cyrus A Weisgerber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:24
CPC Classifications
C; C08; C08F; C08F226/00; C08F226/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE PROCESS OF PREPARING A COPOLYMER OF AN ALLYL ACYLAMIDE SELECTED FROM THE GROUP CONSISTING OF ALLYL AND METHALLYL ACETAMIDES AND A COPOLYMERIZABLE, ETHYLENICALLY UNSATURATED ORGANIC COMPOUND, CONTAINING NO MORE THAN 2 DOUBLE BONDS, WHICH COMPRISES HEATING A MIXTURE OF THE ALLYL ACYLAMIDE AND THE COPOLYMERIZABLE COMPOUND IN A MOLAR RATIO OF FROM ABOUT 1:7 TO ABOUT 1:1, RESPECTIVELY, IN THE PRESENCE OF A PEROXIDE CATALYST.
Claim 2
Dependent Claim
66 words
THE PROCESS OF PREPARING A COPOLYMER OF AN ALLYL ACYLAMIDE SELECTED FROM THE GROUP CONSISTING OF ALLYL AND METHALLYL ACETAMIDES AND A COPOLYMERIZABLE, ETHYLENICALLY UNSATURATED ORGANIC COMPOUND, CONTAINING NO MORE THAN 2 DOUBLE BONDS, WHICH COMPRISES HEATING A MIXTURE OF THE ALLYL ACYLAMIDE AND THE COPOLYMERIZABLE COMPOUND IN A MOLAR RATIO OF FROM ABOUT 1:7 TO ABOUT 1:1, RESPECTIVELY, IN THE PRESENCE OF A PEROXIDE CATALYST.
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) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |