US2454653A
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US
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Method of and apparatus for the removal of solids from liquids, with a control operating in response to viscosity or pressure
Assignee: Graver Energy Systems Inc
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Filing: 1944-11-27
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Granted: 1948-11-23
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Expires: 1964-11-27
Abstract
No abstract record available.
Inventors
- 👤 Ewald A Kamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:35
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/006; B; B01; B01D; B01D21/00; B01D21/24; B01D21/245; B01D21/30; B01D21/302; B01D21/32; B01D21/34; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0379; Y10T137/7722; Y10T137/7758; Y10T137/7759
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |