Patent US2745824A successfully refreshed from Google Patents.
US2745824A
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Process for the polymerization of styrene and acrylonitrile
Assignee: Wyeth Holdings LLC
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Filing: 1953-06-10
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Granted: 1956-05-15
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Expires: 1973-06-10
Abstract
No abstract record available.
Inventors
- 👤 James A Melchore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/36; B; B01; B01J; B01J19/00; B01J19/18; B01J19/1862; B01J19/20; B29; B29B; B29B7/00; B29B7/80; B29B7/84; B29B9/00; B29B9/02; B29B9/06; C08F220/00; C08F220/02; C08F220/42; C08F220/44; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00087; B01J2219/00094; B01J2219/00105; B01J2219/00108; B01J2219/00159; B01J2219/00164
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A PROCESS FOR PRODUCING A THERMOPLASTIC RESINOUS MATERIAL WHICH COMPRISES THE POLYMERIZATION OF A MIXTURE COMPRISING FROM ABOUT 90% TO ABOUT 60% BY WEIGHT OF A COMPOUND REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
31 words
A PROCESS FOR PRODUCING A THERMOPLASTIC RESINOUS MATERIAL WHICH COMPRISES THE POLYMERIZATION OF A MIXTURE COMPRISING FROM ABOUT 90% TO ABOUT 60% BY WEIGHT OF A COMPOUND REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
GB590247A
Cited
US2530409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |