US2446467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry plate rectifier
Assignee: Fansteel Inc
•
Filing: 1944-11-11
•
Granted: 1948-08-03
•
Expires: 1964-11-11
Abstract
No abstract record available.
Inventors
- 👤 Stanley S Fry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/043; H10P; H10P14/00; H10P14/20; H10P14/29; H10P14/2901; H10P14/2923; H10P14/32; H10P14/3202; H10P14/3241; H10P14/34; H10P14/3402; H10P14/38; H10P14/3802
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2189576A
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US2173249A
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US2175016A
Cited
US2162613A
Cited
US2227827A
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US2226715A
Cited
US2316905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |