US3463178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level controller
Assignee: Rucker Co
•
Filing: 1967-05-12
•
Granted: 1969-08-26
•
Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 William O Kirchmier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:05
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/003; G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/165; G01F23/167; G05; G05D; G05D9/00; G05D9/04; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2065; Y10T137/2071; Y10T137/212; Y10T137/2125; Y10T137/2147; Y10T137/7287; Y10T137/7303; Y10T137/7313; Y10T137/7323
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2061608A
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US2956581A
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US3107850A
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US3250285A
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US3277914A
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US3342197A
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US3340885A
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US3324730A
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US3331380A
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US3286086A
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US3360002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |