US2812773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid control apparatus
Assignee: PROCESS ENGINEERS Inc
•
Filing: 1954-12-14
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Granted: 1957-11-12
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Expires: 1974-12-14
Abstract
No abstract record available.
Inventors
- 👤 Albert L Mcgee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:18
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/006; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/7722; Y10T137/7736; Y10T137/7758; Y10T137/7761; Y10T137/8593; Y10T137/86389; Y10T137/86405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2044164A
Cited
US2204225A
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US2147422A
Cited
US2295366A
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US2461592A
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US2707440A
Cited
US2725196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |