US1905383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for hydrogenating or dehydrogenating hydrocarbons
Assignee: Phillips Petroleum Co
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Filing: 1930-07-22
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Granted: 1933-04-25
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Expires: 1950-07-22
Abstract
No abstract record available.
Inventors
- 👤 Walter F Huppke
- 👤 Frederick E Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:51
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-04-24 | 1936-10-24 | 1937-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-04-24 | 1940-10-24 | 1941-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-04-24 | 1944-10-24 | 1945-04-25 | $7700.00 | Window Closed / Lapsed |