Patent US3825897A successfully refreshed from Google Patents.
Patent US2171970A successfully refreshed from Google Patents.
US2171970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube
Assignee: RCA Corp
•
Filing: 1937-01-07
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Granted: 1939-09-05
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Expires: 1957-01-07
Abstract
No abstract record available.
Inventors
- 👤 Brett George Fairburn
- 👤 Banks George Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:50
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/24; Y; Y10; Y10S; Y10S428/00; Y10S428/917
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) | 1942-09-04 | 1943-03-06 | 1943-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-04 | 1947-03-06 | 1947-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-04 | 1951-03-06 | 1951-09-05 | $7700.00 | Window Closed / Lapsed |