US3280086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing polymers using redox systems at ph values of 4 to 5
Assignee: Japan Exlan Co Ltd
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Filing: 1964-02-24
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Granted: 1966-10-18
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Expires: 1984-02-24
Abstract
No abstract record available.
Inventors
- 👤 Nakajima Akira
- 👤 Takeya Kenji
- 👤 Hoten Masanobu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:18
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F2/00; C08F2/12; C08F2/16; C08F20/00; C08F20/02; C08F20/42; C08F20/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A PROCESS FOR PRODUCING A HOMOPOLYMER OF ACRYLONITRILE AND A COPOLYMER OF ACRYLONITRILE AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF METHYL ACRYLATE, VINYL ACETATE AND METHYL METHACRYLATE, THE POLYMERIZATION BEING CONDUCTED IN AN AQUEOUS MEDIUM THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE POLYMERIZATION AT A PH OF BETWEEN 4 AND 5 AND IN A CATALYST SYSTEM CONSISTING ESSENTIALLY OF ABOUT 0.5 TO 20%, BASED ON THE WEIGHT OF THE MONOMER, OF A WATER SOLUBLE OXYGEN LIBERATING COMPOUND AND MORE THAN 0.2 MOLES, BASED ON SAID OXYGEN LIBERATING COMPOUND, OF AN INORGANIC PHOSPHOROUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHOROUS ACID AND WATER SOLUBLE SALTS THEREOF.
Claim 2
Dependent Claim
110 words
IN A PROCESS FOR PRODUCING A HOMOPOLYMER OF ACRYLONITRILE AND A COPOLYMER OF ACRYLONITRILE AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF METHYL ACRYLATE, VINYL ACETATE AND METHYL METHACRYLATE, THE POLYMERIZATION BEING CONDUCTED IN AN AQUEOUS MEDIUM THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE POLYMERIZATION AT A PH OF BETWEEN 4 AND 5 AND IN A CATALYST SYSTEM CONSISTING ESSENTIALLY OF ABOUT 0.5 TO 20%, BASED ON THE WEIGHT OF THE MONOMER, OF A WATER SOLUBLE OXYGEN LIBERATING COMPOUND AND MORE THAN 0.2 MOLES, BASED ON SAID OXYGEN LIBERATING COMPOUND, OF AN INORGANIC PHOSPHOROUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHOROUS ACID AND WATER SOLUBLE SALTS THEREOF.
References Cited (Backward Citations)
US2543635A
Cited
US2629712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |