US2742447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polysulfone resins with a benzimidazolethiol
Assignee: Phillips Petroleum Co
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Filing: 1952-11-20
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Granted: 1956-04-17
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Expires: 1972-11-20
Abstract
No abstract record available.
Inventors
- 👤 Robert J Fanning
- 👤 Rector P Louthan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:09
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A COMPOSITION COMPRISING A POLYSULFONE RESIN, FORMED BY THE INTERACTION OF SULFUR DIOXIDE AND AN UNSATURATED ORGANIC COMPOUND WHEREIN THE UNSATURATION IS A CARBON TO CARBON BOND BETWEEN ADJACENT CARBON ATOMS AND WHICH WILL REACT WITH SULFUR DIOXIDE TO FORM A RESIN, AND 5-CHLORO-2-BENZIMIDAZOLETHIOL.
Claim 2
Dependent Claim
44 words
A COMPOSITION COMPRISING A POLYSULFONE RESIN, FORMED BY THE INTERACTION OF SULFUR DIOXIDE AND AN UNSATURATED ORGANIC COMPOUND WHEREIN THE UNSATURATION IS A CARBON TO CARBON BOND BETWEEN ADJACENT CARBON ATOMS AND WHICH WILL REACT WITH SULFUR DIOXIDE TO FORM A RESIN, AND 5-CHLORO-2-BENZIMIDAZOLETHIOL.
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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |