Patent DE410137C successfully refreshed from Google Patents.
Patent US1447797A successfully refreshed from Google Patents.
US1447797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief mechanism for storage batteries
Assignee: US Light and Heat Corp
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Filing: 1918-04-20
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Granted: 1923-03-06
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Expires: 1938-04-20
Abstract
No abstract record available.
Inventors
- 👤 Warren P Loudon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:10
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/60; H01M50/609; H01M50/627; H01M50/636; H01M50/645; H01M50/655; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S16/00; Y10S16/15; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0874
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) | 1926-03-05 | 1926-09-04 | 1927-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-03-05 | 1930-09-04 | 1931-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-03-05 | 1934-09-04 | 1935-03-06 | $7700.00 | Window Closed / Lapsed |