US2608554A
Expired / Lapsed
US
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Basic catalysis of the polymerization of acrylonitrile
Assignee: EIDP Inc
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Filing: 1948-07-03
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Granted: 1952-08-26
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Expires: 1968-07-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Orville Horwitz Bullitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:13
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/36; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR THE POLYMERIZATION OF ACRYLONITRILE WHEREIN ACRYLONITRILE IS BROUGHT IN CONTACT AT A TEMPERATURE BETWEEN -50* C. AND -90* C. WITH THE SALT, WITH AN ALKALI FORMING METAL, OF AN ACID HAVING A PKA OF 15-75 IN AN AHYDROUS MEDIUM INERT TO ACRYLONTRILE AND OF PKA AT LEAST EQUAL TO THAT OF SAID ACID.
Claim 2
Dependent Claim
56 words
A PROCESS FOR THE POLYMERIZATION OF ACRYLONITRILE WHEREIN ACRYLONITRILE IS BROUGHT IN CONTACT AT A TEMPERATURE BETWEEN -50* C. AND -90* C. WITH THE SALT, WITH AN ALKALI FORMING METAL, OF AN ACID HAVING A PKA OF 15-75 IN AN AHYDROUS MEDIUM INERT TO ACRYLONTRILE AND OF PKA AT LEAST EQUAL TO THAT OF SAID ACID.
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) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |