Patent US2189261A successfully refreshed from Google Patents.
US2189261A
Expired / Lapsed
US
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Cathode-ray tube and the like
Assignee: Hygrade Sylvania Corp
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Filing: 1937-06-29
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Granted: 1940-02-06
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Expires: 1957-06-29
Abstract
No abstract record available.
Inventors
- 👤 Robert M Bowie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:48
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/861; C; C03; C03B; C03B11/00; C03B11/06; C03B11/10; C03B11/14; C03B23/00; C03B23/0073; C03B23/20; C03B23/207; C03B23/217; C03C; C03C27/00; C03C27/02; H01J5/00; H01J5/20; H01J9/00; H01J9/24; H01J9/244; H01J2893/00; H01J2893/0033; H01J2893/0037; Y; Y10; Y10T; Y10T403/00; Y10T403/47; Y10T403/477
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) | 1943-02-05 | 1943-08-07 | 1944-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-05 | 1947-08-07 | 1948-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-05 | 1951-08-07 | 1952-02-06 | $7700.00 | Window Closed / Lapsed |