Patent US2931793A successfully refreshed from Google Patents.
US2931793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing thermoplastic polymers
Assignee: Wyeth Holdings LLC
•
Filing: 1956-03-30
•
Granted: 1960-04-05
•
Expires: 1976-03-30
Abstract
No abstract record available.
Inventors
- 👤 James A Melchore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:49
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
18 words
A PROCESS FOR PRODUCING A THERMOPLASTIC RESINOUS MATERIAL FROM MONOMERS CONSISTING OF THOSE REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
18 words
A PROCESS FOR PRODUCING A THERMOPLASTIC RESINOUS MATERIAL FROM MONOMERS CONSISTING OF THOSE REPRESENTED BY THE GENERAL FORMULA
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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |