Patent US2758982A successfully refreshed from Google Patents.
US2758982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amides as stabilizers for polysulfone resins
Assignee: Phillips Petroleum Co
•
Filing: 1951-07-11
•
Granted: 1956-08-14
•
Expires: 1971-07-11
Abstract
No abstract record available.
Inventors
- 👤 John E Wicklatz
- 👤 John F Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:12
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
20 words
A MONO-OLEFIN-SULFUR DIOXIDE POLYSULFONE RESIN STABILIZED WITH AN AMIDE SELECTED FROM THE GROUP CONSISTING OF AMIDES REPRESENTED BY THE FORMULAS
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) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |