US2825886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube viewing device
Assignee: SOUTHWESTERN IND ELECTRONICS C
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Filing: 1956-06-07
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Granted: 1958-03-04
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Expires: 1976-06-07
Abstract
No abstract record available.
Inventors
- 👤 Robert R Pittman
- 👤 Louis W Erath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:02
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V1/34; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/28
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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |