Patent US2936658A successfully refreshed from Google Patents.
US3474445A
Expired / Lapsed
US
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Display tubes and systems
Assignee: Stromberg Carlson Corp
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Filing: 1967-07-11
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Granted: 1969-10-21
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Expires: 1987-07-11
Abstract
No abstract record available.
Inventors
- 👤 James H Redman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:17
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/892; G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/538; G01S7/00; G01S7/02; G01S7/04; G01S7/06; Y; Y10; Y10S; Y10S348/00; Y10S348/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |