Patent US2440525A successfully refreshed from Google Patents.
US2440525A
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Dehydrogenation of hydrocarbons
Assignee: Standard Oil Development Co
•
Filing: 1944-06-24
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Granted: 1948-04-27
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Expires: 1964-06-24
Abstract
No abstract record available.
Inventors
- 👤 Bruno E Roetheli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:18
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; B; B01; B01J; B01J8/00; B01J8/08; B01J8/12; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/943
Claims Analysis
Total Claims: 0
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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) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |