Patent US2433181A successfully refreshed from Google Patents.
US2433181A
Expired / Lapsed
US
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Ignitron
Assignee: Westinghouse Electric Corp
•
Filing: 1945-05-16
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Granted: 1947-12-23
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Expires: 1965-05-16
Abstract
No abstract record available.
Inventors
- 👤 John E White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:18
CPC Classifications
H; H01; H01J; H01J13/00; H01J13/02; H01J13/04; H01J13/16; H01J13/50; H01J2893/00; H01J2893/0072; H01J2893/0088; H01J2893/009; H01J2893/0091; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/12; Y10T428/12229; Y10T428/12264; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917; Y10T428/12924; Y10T428/12951; Y10T428/12972
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE182381C
Cited
US1900600A
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US1088902A
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DE435536C
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GB243378A
Cited
FR640818A
Cited
FR708162A
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US2093711A
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US2251631A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-22 | 1951-06-23 | 1951-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-22 | 1955-06-23 | 1955-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-22 | 1959-06-23 | 1959-12-23 | $7700.00 | Window Closed / Lapsed |