US2428624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dehydrogenating butene
Assignee: Standard Oil Development Co
•
Filing: 1943-11-10
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Granted: 1947-10-07
•
Expires: 1963-11-10
Abstract
No abstract record available.
Inventors
- 👤 Clinton H Holder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:30
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/322; C07C5/327; C07C5/333; C07C5/3332; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901; Y10S585/906; Y10S585/949; Y10S585/954
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1732381A
Cited
US2148140A
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US2211219A
Cited
US2315107A
Cited
US2391646A
Cited
US2367620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |