US2143340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas operated signal for secondary batteries
Assignee: Individual
•
Filing: 1937-03-11
•
Granted: 1939-01-10
•
Expires: 1957-03-11
Abstract
No abstract record available.
Inventors
- 👤 Elton L Willits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:00
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/56; G01F23/58; G01F23/585; G01F23/0007; G01F23/0015; H; H01; H01M; H01M50/00; H01M50/60; H01M50/609; H01M50/618; H01M50/627; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8326
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) | 1942-01-09 | 1942-07-11 | 1943-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-09 | 1946-07-11 | 1947-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-09 | 1950-07-11 | 1951-01-10 | $7700.00 | Window Closed / Lapsed |