Patent US2443852A successfully refreshed from Google Patents.
US2443852A
Expired / Lapsed
US
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Condensation of olefinic compounds with hydrogen sulfide
Assignee: Sharples Chemicals Inc
•
Filing: 1944-08-22
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Granted: 1948-06-22
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Expires: 1964-08-22
Abstract
No abstract record available.
Inventors
- 👤 John L Eaton
- 👤 John F Olin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:39
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
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US1836171A
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US2052210A
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US2061018A
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US2052268A
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US2051807A
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US2137584A
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US2352435A
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US2296399A
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US2252138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |