US2422501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for carrying out chemical reactions in the presence of finely-divided powder
Assignee: Standard Oil Development Co
•
Filing: 1944-12-08
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Granted: 1947-06-17
•
Expires: 1964-12-08
Abstract
No abstract record available.
Inventors
- 👤 Bruno E Roetheli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:08
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/32; C; C10; C10B; C10B49/00; C10B49/16; C10G; C10G9/00; C10G9/28; C10G9/32
Claims Analysis
Total Claims: 0
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US2373358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |