US2481583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation of olefinic compounds with hydrogen sulfide
Assignee: Sharples Chemicals Inc
•
Filing: 1943-12-30
•
Granted: 1949-09-13
•
Expires: 1963-12-30
Abstract
No abstract record available.
Inventors
- 👤 John B Fenn
- 👤 John L Eaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:51
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/02; C07C319/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1836170A
Cited
US1836183A
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US2101096A
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US2052268A
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US2051806A
Cited
US2173482A
Cited
US2352435A
Cited
US2366453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |