US2656341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic polymerization process
Assignee: Beazer East Inc
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Filing: 1948-09-28
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Granted: 1953-10-20
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Expires: 1968-09-28
Abstract
No abstract record available.
Inventors
- 👤 Alelio Gaetano F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:06
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE PROCESS OF POLYMERIZING A POLYMERIZABLE MASS CONTAINING A COMPOUND OF THE CLASS CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE AS THE ONLY POLYMERIZABLE CONSTITUENT THEREOF, INTIMATELY MIXED WITH A CATALYST-COMBINATION CONSISTING OF TERTIARY BUTYL PERBENZOATE AND A BENZOYL PEROXIDE AND ITS CHLORO, BROMO, FLUORO, ALZOYL PEROXIDE AND ITS CHLORO, BROMO, FLUORO, ALKOXY, ALKYL, BENZO AND CARBOPEROXY NUCLEARSUBSTITUTED DERIVATIVES, BY HEATING THE POLYMERIZABLE MASS AT A TEMPERATURE BETWEEN ABOUT 25* C. AND ABOUT 80* C. UNTIL AT LEAST ABOUT 60 PER CENT CONVERSION TO POLYMER HAS BEEN EFFECTED, AND SUBSEQUENTLY AT A TEMPERATURE BETWEEN ABOUT 85* C. AND ABOUT 125* C. UNTIL SUBSTANTIALLY COMPLETE POLYMERIZATION HAS BEEN EFFECTED.
Claim 2
Dependent Claim
106 words
THE PROCESS OF POLYMERIZING A POLYMERIZABLE MASS CONTAINING A COMPOUND OF THE CLASS CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE AS THE ONLY POLYMERIZABLE CONSTITUENT THEREOF, INTIMATELY MIXED WITH A CATALYST-COMBINATION CONSISTING OF TERTIARY BUTYL PERBENZOATE AND A BENZOYL PEROXIDE AND ITS CHLORO, BROMO, FLUORO, ALZOYL PEROXIDE AND ITS CHLORO, BROMO, FLUORO, ALKOXY, ALKYL, BENZO AND CARBOPEROXY NUCLEARSUBSTITUTED DERIVATIVES, BY HEATING THE POLYMERIZABLE MASS AT A TEMPERATURE BETWEEN ABOUT 25* C. AND ABOUT 80* C. UNTIL AT LEAST ABOUT 60 PER CENT CONVERSION TO POLYMER HAS BEEN EFFECTED, AND SUBSEQUENTLY AT A TEMPERATURE BETWEEN ABOUT 85* C. AND ABOUT 125* C. UNTIL SUBSTANTIALLY COMPLETE POLYMERIZATION HAS BEEN EFFECTED.
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |