US3168458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical cell
Assignee: Standard Oil Co
•
Filing: 1961-12-27
•
Granted: 1965-02-02
•
Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 James W Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:02
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/17; C25B9/19; C25B9/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE75033C
Cited
US1006836A
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US1771091A
Cited
FR1024890A
Cited
US2691628A
Cited
US2987472A
Cited
US2794777A
Cited
US3084113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |