US2743263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing acrylonitrile in the presence of sulfonic acids
Assignee: Eastman Kodak Co
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Filing: 1952-08-25
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Granted: 1956-04-24
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Expires: 1972-08-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Theodore E Stanin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:31
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/12; C08F2/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR PREPARING POLYMERS OF ACRYLONITRILE COMPRISING POLYMERIZING ACRYLONITRILE IN A SOLUTION IN THE PRESENCE OF A PERSULFATE POLYMERIZATION CATALYST, A SUFFICIENT QUANITY OF AN ACID OF SULFUR SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
38 words
A PROCESS FOR PREPARING POLYMERS OF ACRYLONITRILE COMPRISING POLYMERIZING ACRYLONITRILE IN A SOLUTION IN THE PRESENCE OF A PERSULFATE POLYMERIZATION CATALYST, A SUFFICIENT QUANITY OF AN ACID OF SULFUR SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2462422A
Cited
US2628223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |