US2307835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercury cell
Assignee: Mathieson Alkali Works Inc
•
Filing: 1938-10-05
•
Granted: 1943-01-12
•
Expires: 1958-10-05
Abstract
No abstract record available.
Inventors
- 👤 William C Gardiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:57
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/70; C25B11/00; C25B11/02; C25B11/033; C25B9/005; C25B9/30; C25B9/303; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86187; Y10T137/86212
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) | 1946-01-11 | 1946-07-13 | 1947-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-01-11 | 1950-07-13 | 1951-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-01-11 | 1954-07-13 | 1955-01-12 | $7700.00 | Window Closed / Lapsed |