Patent DE834711C successfully refreshed from Google Patents.
US2442319A
Expired / Lapsed
US
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Process and catalyst for the dehydrogenation of olefines
Assignee: Dow Chemical Co
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Filing: 1944-04-03
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Granted: 1948-05-25
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Expires: 1964-04-03
Abstract
No abstract record available.
Inventors
- 👤 Edgar C Britton
- 👤 Andrew J Dietzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:53
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; B; B01; B01J; B01J27/00; B01J27/14; B01J27/185; B01J27/1853; C07C5/327; C07C5/333; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2102751A
Cited
US1215335A
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US2197707A
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US1882712A
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US2232610A
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US2084511A
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US2265641A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-25 | 1951-11-24 | 1952-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-25 | 1955-11-24 | 1956-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-25 | 1959-11-24 | 1960-05-25 | $7700.00 | Window Closed / Lapsed |