US2504074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interpolymers of acrylamide and methacrylamide
Assignee: GAF Chemicals Corp
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Filing: 1945-10-16
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Granted: 1950-04-11
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Expires: 1965-10-16
Abstract
No abstract record available.
Inventors
- 👤 Giffin D Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:12
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/56
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
A COMPOSITION OF MATTER-COMPRISING GELATIN AND WATER-SOLUBLE, GELATIN-COMPATIBLE INTERPOLYMER OF METHACRYLAMIDE AND ACRYLAMIDE IN WHICH THE RATIO OF METHACRYLAMIDE TO ACRYLAMIDE IS FROM 1:9 TO 9:1 PREPARED BY CATALYTIC COPOLYMERIZATION OF THE MONOMER COMPONENTS AT A TEMPERATURE FROM ROOM TEMPERATURE TO 40*C., IN AN INERT SOLVENT COMPOSED ESSENTIALLY OF A SATURATED MONOHYDRIC ALIPHATIC ALCOHOL AND UP TO 2.5 PARTS OF WATER TO EACH 8 PARTS OF SAID ALCOHOL, UNTIL A WATER-SOLUBLE INTERPOLYMER IS OBTAINED, THE RATIO OF SAID INTERPOLYMER TO GELATIN BEING 1:9.
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) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |