US2461147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation process
Assignee: Shell Development Co
•
Filing: 1946-04-24
•
Granted: 1949-02-08
•
Expires: 1966-04-24
Abstract
No abstract record available.
Inventors
- 👤 Elwyn P Davles
- 👤 Frank T Eggertsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:22
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/322; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; C07C5/327; C07C5/333; C07C5/3332
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1752692A
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US2036752A
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US2327189A
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US2377083A
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US2408146A
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US2395875A
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US2383643A
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US2395876A
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US2370797A
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US2370798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |