US2928037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermistor liquid level switch
Assignee: Avien Inc
•
Filing: 1954-12-02
•
Granted: 1960-03-08
•
Expires: 1974-12-02
Abstract
No abstract record available.
Inventors
- 👤 Maxwell J Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:19
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/18; H01H35/183; G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246; G01F23/247; H01H37/00; H01H37/02; H01H37/32; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2533286A
Cited
US2487526A
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US2635225A
Cited
US2525967A
Cited
US2526251A
Cited
US2667178A
Cited
US2672880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |