US3705137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precipitation copolymerization of metal salts of unsaturated carboxylic acids
Assignee: Mitsui Kinzoku Co Ltd
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Filing: 1969-12-04
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Granted: 1972-12-05
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Expires: 1989-12-04
Abstract
Abstract A METHOD OF PREPARING COPOLYMERS OF METAL SALTS OF UNSATURATED CARBOXYLIC ACIDS SUITABLE FOR USE AS A STABILIZER FOR CHLORINE-CONTAINING RESINS, SUCH AS POLYVINYL CHLORIDE, BY MEANS OF PRECIPITATION COPOLYMERIZATION IN AN ALCOHOL SOLUTION CONTAINING WATER. A STABILIZER COMPOSITION COMPRISING A MIXTURE OF SAID COPOLYMERS OF METAL SALTS OF UNSTURATED CARBOXYLIC ACIDS AND CHLORINE-CONTAINING RESIN.
Inventors
- 👤 Kenshi Kuwahara
- 👤 Shigetada Sonoda
- 👤 Masahito Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:26
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/62; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C08L; C08L27/00; C08L27/02; C08L27/04; C08L33/00; C08L33/02
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |