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US2420129A
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US
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Controlling the flow of fluidized solids and liquids
Assignee: Universal Oil Products Co
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Filing: 1942-10-23
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Granted: 1947-05-06
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Expires: 1962-10-23
Abstract
No abstract record available.
Inventors
- 👤 Bernard J Flock
- 👤 Clarence G Gerhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:29
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1809; B01J8/24; B01J8/26; B01J2208/00; B01J2208/00008; B01J2208/00539; B01J2208/00548
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2387309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |