US2543237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of new resinous compositions from sulfones and formaldehyde
Assignee: British Resin Products Ltd
•
Filing: 1947-05-06
•
Granted: 1951-02-27
•
Expires: 1967-05-06
Abstract
No abstract record available.
Inventors
- 👤 Evans Edward Michael
- 👤 Hookway Harry Thurston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:37
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218; C08G16/0237
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
A PROCESS WHICH COMPRISES REACTING A HYDROCARBON SULPHONE CONTAINING THE RADICAL
References Cited (Backward Citations)
US2363616A
Cited
US2410395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |