US2534347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of poly-sulfone amide polymers
Assignee: Acordis UK Ltd
•
Filing: 1950-02-17
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Granted: 1950-12-19
•
Expires: 1970-02-17
Abstract
No abstract record available.
Inventors
- 👤 Fisher James Wotherspoon
- 👤 Wheatley Edward William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:54
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
PROCESS FOR THE PRODUCTION OF A LINEAR POLYSULPHONE-AMIDE, WHICH COMPRISES OXIDIZING THE CORRESPONDING LINEAR POLY-THIO-ETHER-CARBOXYLICAMIDE CONTAINING THE THIO-ETHER AND CARBOXYLICAMIDE GROUPS IN THE LINEAR CHAIN BY MEANS OF A PEROXIDE IN A REACTION MEDIUM CONSISTING OF A MIXTURE OF FORMIC AND ACETIC ACIDS CONTAINING UP TO 25% BY WEIGHT OF WATER ON THE COMBINED WEIGHTS OF THE TWO ACIDS.
Claim 2
Dependent Claim
59 words
PROCESS FOR THE PRODUCTION OF A LINEAR POLYSULPHONE-AMIDE, WHICH COMPRISES OXIDIZING THE CORRESPONDING LINEAR POLY-THIO-ETHER-CARBOXYLICAMIDE CONTAINING THE THIO-ETHER AND CARBOXYLICAMIDE GROUPS IN THE LINEAR CHAIN BY MEANS OF A PEROXIDE IN A REACTION MEDIUM CONSISTING OF A MIXTURE OF FORMIC AND ACETIC ACIDS CONTAINING UP TO 25% BY WEIGHT OF WATER ON THE COMBINED WEIGHTS OF THE TWO ACIDS.
References Cited (Backward Citations)
US2158064A
Cited
US2201884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |