Patent US2508005A successfully refreshed from Google Patents.
US2508005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cyclic thioethers
Assignee: Shell Development Co
•
Filing: 1947-04-07
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Granted: 1950-05-16
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Expires: 1967-04-07
Abstract
No abstract record available.
Inventors
- 👤 Seaver A Ballard
- 👤 Rupert C Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:26
CPC Classifications
C; C07; C07D; C07D327/00; C07D327/02; C07D327/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
A METHOD WHICH COMPRISES HEATING A POLYMER HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |