US2425807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contacting solids and gaseous fluids
Assignee: Standard Oil Development Co
•
Filing: 1944-08-30
•
Granted: 1947-08-19
•
Expires: 1964-08-30
Abstract
No abstract record available.
Inventors
- 👤 Charles E Jahnig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:35
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1872
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE21526E
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US2273075A
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US2379408A
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US2304128A
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US2378531A
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US2361978A
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US2367694A
Cited
US2380760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |