Patent US3669755A successfully refreshed from Google Patents.
US3669755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery closure device
Assignee: DONALD W HUGHES JR
•
Filing: 1970-11-09
•
Granted: 1972-06-13
•
Expires: 1990-11-09
Abstract
Abstract The invention relates to apparatus for simultaneously opening or closing all of the cell openings of a multi-cell storage battery. The closure device takes the form of a slider unit that may occupy either of the two positions; one of the positions exposing all of the cell openings for servicing, and the other of said positions sealing all of the cell openings, except for venting purposes.
Inventors
- 👤 Donald W Hughes Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:34
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/147; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |