Patent US2444035A successfully refreshed from Google Patents.
US2444035A
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Process for dehydrogenating hydrocarbons using as catalyst calcium oxide on calcium carbonate
Assignee: Beazer East Inc
•
Filing: 1943-12-31
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Granted: 1948-06-29
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Expires: 1963-12-31
Abstract
No abstract record available.
Inventors
- 👤 Corson Ben Bennett
- 👤 Webb George Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:53
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16; C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/322; C07C5/327; C07C5/333; C07C5/3332
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2217009A
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US2257082A
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US2343295A
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US2395875A
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US2397218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |