Patent US2534366A successfully refreshed from Google Patents.
US2534366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polymeric compounds
Assignee: Celanese Corp
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Filing: 1948-07-28
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Granted: 1950-12-19
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Expires: 1968-07-28
Abstract
No abstract record available.
Inventors
- 👤 Herman D Noether
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:39
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; Y; Y10; Y10S; Y10S525/00; Y10S525/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
IN A PROCESS FOR THE PRODUCTION OF A POLYMERIC SULFONE FROM THE CORRESPONDING POLYMERIC SULFIDE, THE STEP WHICH COMPRISES OXIDIZING SAID POLYMERIC SULFIDE WITH A PEROXIDE IN A REACTION MEDIUM COMPRISING CONCENTRATED FORMIC ACID.
Claim 2
Dependent Claim
34 words
IN A PROCESS FOR THE PRODUCTION OF A POLYMERIC SULFONE FROM THE CORRESPONDING POLYMERIC SULFIDE, THE STEP WHICH COMPRISES OXIDIZING SAID POLYMERIC SULFIDE WITH A PEROXIDE IN A REACTION MEDIUM COMPRISING CONCENTRATED FORMIC ACID.
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) | 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 |