Patent US3237039A successfully refreshed from Google Patents.
US3237039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube using fiber optics faceplate
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1961-04-17
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Granted: 1966-02-22
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Expires: 1981-04-17
Abstract
No abstract record available.
Inventors
- 👤 Norman F Fyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:08
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
IN COMBINATION, A VACUUM TUBE HAVING A FACEPLATE, A PLURALITY OF FIBER OPTIC ELEMENTS EXTENDING SUBSTANTIALLY THROUGH SAID FACEPLATE, THE INNER ENDS OF SAID FIBER OPTIC ELEMENTS BEING CONVEX, AND PHOSPHOR MATERIAL ON THE CONVEX SURFACES OF SAID FIBER OPTIC ELEMENTS.
Claim 2
Dependent Claim
41 words
IN COMBINATION, A VACUUM TUBE HAVING A FACEPLATE, A PLURALITY OF FIBER OPTIC ELEMENTS EXTENDING SUBSTANTIALLY THROUGH SAID FACEPLATE, THE INNER ENDS OF SAID FIBER OPTIC ELEMENTS BEING CONVEX, AND PHOSPHOR MATERIAL ON THE CONVEX SURFACES OF SAID FIBER OPTIC ELEMENTS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |