US2834764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process employing n-substituted-benzosulfotriazine polymerization catalysts
Assignee: Wyeth Holdings LLC
•
Filing: 1954-12-14
•
Granted: 1958-05-13
•
Expires: 1974-12-14
Abstract
No abstract record available.
Inventors
- 👤 Walter M Thomas
- 👤 Frank A V Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:55
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
12 words
A PROCESS FOR POLYMERIZING ACRYLONITRILE AND A COMPOUND OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2376015A
Cited
US2527393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |