US3203938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for copolymerizing an alkali metal ethylene sulfonate in lower saturated alcohols with free radical polymerization catalysts
Assignee: Wyeth Holdings LLC
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Filing: 1961-11-10
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Granted: 1965-08-31
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Expires: 1981-11-10
Abstract
No abstract record available.
Inventors
- 👤 Robert L Baechtold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:49
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/62; C08F28/00; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/17; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR PREPARING LOW MOLECULAR WEIGHT WATERSOLUBLE POLYMERS WHICH COMPRISES COPOLYMERIZING AN ALKALI METAL ETHYLENESULFONATE AND A MONOMER OF THE GROUP CONSISTING OF ACRYLAMIDE AND ACRYLIC ACID IN A LOWER SATURATED ALIPHATIC ALCOHOL IN THE PRESENCE OF FREE RADICAL INITIATING POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF INORGANIC CATALYST, ORGANIC CATALYST, AND MIXTURES THEREOF.
Claim 2
Dependent Claim
56 words
A PROCESS FOR PREPARING LOW MOLECULAR WEIGHT WATERSOLUBLE POLYMERS WHICH COMPRISES COPOLYMERIZING AN ALKALI METAL ETHYLENESULFONATE AND A MONOMER OF THE GROUP CONSISTING OF ACRYLAMIDE AND ACRYLIC ACID IN A LOWER SATURATED ALIPHATIC ALCOHOL IN THE PRESENCE OF FREE RADICAL INITIATING POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF INORGANIC CATALYST, ORGANIC CATALYST, AND MIXTURES THEREOF.
References Cited (Backward Citations)
US2834759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |