Patent US2854993A successfully refreshed from Google Patents.
US2854993A
Expired / Lapsed
US
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Differential pressure liquid level and moisture control device
Assignee: Individual
•
Filing: 1955-08-30
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Granted: 1958-10-07
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Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 Lyle L Duncan
- 👤 Donald H Courter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:22
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/04; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/161; Y; Y10; Y10S; Y10S261/00; Y10S261/34; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339; Y10T137/7349
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |