Patent US2429751A successfully refreshed from Google Patents.
US2429751A
Expired / Lapsed
US
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Separation of gases from solid particles
Assignee: Standard Oil Development Co
•
Filing: 1944-09-23
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Granted: 1947-10-28
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Expires: 1964-09-23
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Gohr
- 👤 Roger W Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:49
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/005
Claims Analysis
Total Claims: 0
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US2292708A
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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) | 1950-10-27 | 1951-04-28 | 1951-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-27 | 1955-04-28 | 1955-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-27 | 1959-04-28 | 1959-10-28 | $7700.00 | Window Closed / Lapsed |