US1821958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level indicating means for multiple cell storage batteries
Assignee: Gabriel Co
•
Filing: 1929-03-18
•
Granted: 1931-09-08
•
Expires: 1949-03-18
Abstract
No abstract record available.
Inventors
- 👤 Eugene L Beecher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:44
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/165; G01F23/167; H; H01; H01M; H01M50/00; H01M50/60; H01M50/609; H01M50/627; Y; Y02; Y02E; Y02E60/00; Y02E60/10
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) | 1934-09-07 | 1935-03-09 | 1935-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-09-07 | 1939-03-09 | 1939-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-09-07 | 1943-03-09 | 1943-09-08 | $7700.00 | Window Closed / Lapsed |