Patent US1979722A successfully refreshed from Google Patents.
US1979722A
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Assignee: Westinghouse Electric Corp
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Filing: 1930-07-30
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Granted: 1934-11-06
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Expires: 1950-07-30
Abstract
No abstract record available.
Inventors
- 👤 Vladimir K Zworykin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:19
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/55; B; B07; B07C; B07C5/00; B07C5/34; B07C5/342; Y; Y10; Y10S; Y10S209/00; Y10S209/941
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) | 1937-11-05 | 1938-05-07 | 1938-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-11-05 | 1942-05-07 | 1942-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-11-05 | 1946-05-07 | 1946-11-06 | $7700.00 | Window Closed / Lapsed |