US2861982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of water-soluble unsaturated monomers with hydrogen atoms
Assignee: Wyeth Holdings LLC
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Filing: 1956-04-13
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Granted: 1958-11-25
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Expires: 1976-04-13
Abstract
No abstract record available.
Inventors
- 👤 Mino Guido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:33
CPC Classifications
C; C08; C08F; C08F4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN THE POLYMERIZATION OF WATER-SOLUBLE, POLAR, ETHYLENICALLY UNSATURATED, MONOMERIC MATERIAL SELECTED FROM THE GLASS CONSISTING OF VINYLPRIDINES, ALPHA-CHLOROACRYCLIC ACID, ALPHA-CHLOROACRYLONITRILE, METHYLENE-BIS-ACRYLAMIDE, ACRYLONITRILE, METHACRYLONITRILE, ACRYLAMIDE, METHACRYLAMIDE, ACRYLIC ACID, METHACRYLIC ACID, AND MIXTURES THEREOF, THE IMPROVEMENT WHEREIN THE SAID MONOMERIC MATERIAL IS POLYMERIZED BY BRINGING THE SAME IN CONTACT, IN AQUEOUS SOLUTION, WITH HYDROGEN ATOMS PRODUCED IN SITU BY THE ACTION OF A STRONG, NON-OXIDIZING, INORGANIC ACID, WHICH IS A COMPONENT OF THE SAID AQUEOUS SOLUTION, ON AMALGAMATED AINC, SAID HYDROGEN ATOMS EING THE SOLE POLYMERIZATION CATALYST FOR THE REACTION.
Claim 2
Dependent Claim
88 words
IN THE POLYMERIZATION OF WATER-SOLUBLE, POLAR, ETHYLENICALLY UNSATURATED, MONOMERIC MATERIAL SELECTED FROM THE GLASS CONSISTING OF VINYLPRIDINES, ALPHA-CHLOROACRYCLIC ACID, ALPHA-CHLOROACRYLONITRILE, METHYLENE-BIS-ACRYLAMIDE, ACRYLONITRILE, METHACRYLONITRILE, ACRYLAMIDE, METHACRYLAMIDE, ACRYLIC ACID, METHACRYLIC ACID, AND MIXTURES THEREOF, THE IMPROVEMENT WHEREIN THE SAID MONOMERIC MATERIAL IS POLYMERIZED BY BRINGING THE SAME IN CONTACT, IN AQUEOUS SOLUTION, WITH HYDROGEN ATOMS PRODUCED IN SITU BY THE ACTION OF A STRONG, NON-OXIDIZING, INORGANIC ACID, WHICH IS A COMPONENT OF THE SAID AQUEOUS SOLUTION, ON AMALGAMATED AINC, SAID HYDROGEN ATOMS EING THE SOLE POLYMERIZATION CATALYST FOR THE REACTION.
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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |