Patent US3135722A successfully refreshed from Google Patents.
US3135722A
Expired / Lapsed
US
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Process for the production of polymers from acrylonitrile
Assignee: Bayer AG
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Filing: 1960-07-19
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Granted: 1964-06-02
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Expires: 1980-07-19
Abstract
No abstract record available.
Inventors
- 👤 Logemann Heino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:43
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
145 words
A METHOD FOR THE PRODUCTION OF ACRYLONITRILE POLYMERS WHICH COMPRISES POLYMERIZING A MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND A MIXTURE OF ACRYLONITRILE AND METHYL ACRYLATE IN AN AQUEOUS MEDIUM HAVING A PH BELOW 7 AND CONTAINING A MIXTURE OF 0.000010.1%, BASED ON THE WEIGHT OF MONOMER EMPLOYED, OF A HEAVY METAL ION SELECTED FROM THE GROUP CONSISTING OF COPPER AND IRON, 0.1-3% OF A COMPLEX FORMER SELECTED FROM THE GROUP CONSISTING OF IMIDO-TRIGLYCOLLIC ACID, ETHYLENE DIAMINE TETRACETIC ACID, AND ALKALI METAL AND AMMONIUM PYROPHOSPHATES, HEXAMETAPHOSPHATES, AND FLUORIDES, 0.53% OF A MOLECULAR WEIGHT REGULATOR SELECTED FROM THE GROUP CONSISTING OF BUTYL MERCAPTAN, HEXYL MERCAPTAN, THIOGLYCOL, AND THE DITHIOGLYCOLS OF ETHYLENE, BUTYLENE AND HEXYLENE AND REDOX SYSTEM SELECTED FROM THE GROUP CONSISTING OF SO2, AMMONIUM PERSULFATES, AND THE ALKALI METAL BISULFITES, PYROSULFITES, THIOSULFATES, AND PERSULFATES, THE POLYMERIZATION BEING CONDUCTED AT A TEMPERATURE OF 30*-70*C.
Claim 2
Independent Claim
145 words
A METHOD FOR THE PRODUCTION OF ACRYLONITRILE POLYMERS WHICH COMPRISES POLYMERIZING A MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND A MIXTURE OF ACRYLONITRILE AND METHYL ACRYLATE IN AN AQUEOUS MEDIUM HAVING A PH BELOW 7 AND CONTAINING A MIXTURE OF 0.000010.1%, BASED ON THE WEIGHT OF MONOMER EMPLOYED, OF A HEAVY METAL ION SELECTED FROM THE GROUP CONSISTING OF COPPER AND IRON, 0.1-3% OF A COMPLEX FORMER SELECTED FROM THE GROUP CONSISTING OF IMIDO-TRIGLYCOLLIC ACID, ETHYLENE DIAMINE TETRACETIC ACID, AND ALKALI METAL AND AMMONIUM PYROPHOSPHATES, HEXAMETAPHOSPHATES, AND FLUORIDES, 0.53% OF A MOLECULAR WEIGHT REGULATOR SELECTED FROM THE GROUP CONSISTING OF BUTYL MERCAPTAN, HEXYL MERCAPTAN, THIOGLYCOL, AND THE DITHIOGLYCOLS OF ETHYLENE, BUTYLENE AND HEXYLENE AND REDOX SYSTEM SELECTED FROM THE GROUP CONSISTING OF SO2, AMMONIUM PERSULFATES, AND THE ALKALI METAL BISULFITES, PYROSULFITES, THIOSULFATES, AND PERSULFATES, THE POLYMERIZATION BEING CONDUCTED AT A TEMPERATURE OF 30*-70*C.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |