US2444473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making rectifiers
Assignee: STC PLC
•
Filing: 1943-10-26
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Granted: 1948-07-06
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Expires: 1963-10-26
Abstract
No abstract record available.
Inventors
- 👤 Murray F Skinker
- 👤 Leslie B Haigh
- 👤 Ralph O Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:00
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; Y; Y10; Y10S; Y10S425/00; Y10S425/811; Y10T; Y10T29/00; Y10T29/49; Y10T29/49799
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2137831A
Cited
US2261725A
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US2244664A
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US2235051A
Cited
US2392744A
Cited
US2359377A
Cited
US2379919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |