US2161776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and means for controlling liquid levels in storage batteries
Assignee: ANTHONY E HEICHEMER
•
Filing: 1936-01-13
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Granted: 1939-06-06
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Expires: 1956-01-13
Abstract
No abstract record available.
Inventors
- 👤 Francis L Orr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:50
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/161; H; H01; H01M; H01M50/00; H01M50/60; H01M50/609; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/4673; Y10T137/4757; Y10T137/4774; Y10T137/4857; Y10T137/6416; Y10T137/6851; Y10T137/6855; Y10T137/6881; Y10T137/6892; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7433; Y10T137/8593; Y10T137/86187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-06-05 | 1942-12-05 | 1943-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-05 | 1946-12-05 | 1947-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-05 | 1950-12-05 | 1951-06-06 | $7700.00 | Window Closed / Lapsed |