US2886557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glyoxal cross-linked acrylamide copolymers
Assignee: NOBEL FRANCAISE SOC
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Filing: 1955-07-14
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Granted: 1959-05-12
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Expires: 1975-07-14
Abstract
No abstract record available.
Inventors
- 👤 Talet Pierre Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/6266; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/56; C08F218/00; C08F218/02; C08F218/04; C08F218/08; C08F8/00; C08F8/14; C08F8/28; C08F8/30; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR OBTAINING A MODIFIED THERMOPLASTIC RESIN OF THE GROUP CONSISTING OF VINYLACETATE AND METHACRYLIC ESTERS WHICH IS HARDER, MORE INSOLUBLE IN ORGANIC SOLVENTS AND MORE HIGHLY HEAT RESISTING THAN SAID UNMODIFIED RESIN, SAID PROCESS CONSISTING IN COPOLYMERIZING A MONOMER FROM SAID GROUP WITH APPROXIMATELY 1 TO 2% BY WEIGHT ACRYLAMIDE, ADDING A SMALL AMOUNT OF AT LEAST 75% BY WEIGHT GLYOXAL TO THE COPOLYMER RESULTING FROM SAID COPOLYMERIZING STEP, MIXING SAID COPOLYMER AND SAID GLYOXAL AND SUBJECTING THEM TO A REACTION TEMPERATURE RANGING FROM 25*C. TO 105*C., WHEREBY A POLYMER IS OBTAINED HAVING THE STRUCTURE OF A THREE-DIMENSIONAL NETWORK.
Claim 2
Dependent Claim
101 words
A PROCESS FOR OBTAINING A MODIFIED THERMOPLASTIC RESIN OF THE GROUP CONSISTING OF VINYLACETATE AND METHACRYLIC ESTERS WHICH IS HARDER, MORE INSOLUBLE IN ORGANIC SOLVENTS AND MORE HIGHLY HEAT RESISTING THAN SAID UNMODIFIED RESIN, SAID PROCESS CONSISTING IN COPOLYMERIZING A MONOMER FROM SAID GROUP WITH APPROXIMATELY 1 TO 2% BY WEIGHT ACRYLAMIDE, ADDING A SMALL AMOUNT OF AT LEAST 75% BY WEIGHT GLYOXAL TO THE COPOLYMER RESULTING FROM SAID COPOLYMERIZING STEP, MIXING SAID COPOLYMER AND SAID GLYOXAL AND SUBJECTING THEM TO A REACTION TEMPERATURE RANGING FROM 25*C. TO 105*C., WHEREBY A POLYMER IS OBTAINED HAVING THE STRUCTURE OF A THREE-DIMENSIONAL NETWORK.
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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |