Patent US3254251A successfully refreshed from Google Patents.
US3254251A
Expired / Lapsed
US
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Cathode ray tube gun having nested electrode assembly
Assignee: RCA Corp
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Filing: 1962-07-06
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Granted: 1966-05-31
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Expires: 1982-07-06
Abstract
No abstract record available.
Inventors
- 👤 Hughes Richard Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:11
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/04; H01J29/46; H01J29/48; H01J29/485; H01J29/51; H01J29/70; H01J29/701; H01J29/702; H01J29/705; H01J29/707; H01J29/82; H01J3/00; H01J3/02; H01J3/027; H01J31/00; H01J31/08; H01J31/10; H01J31/20; H01J31/201; H01J31/203; H01J31/205; H01J31/50; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/18; H04N9/20; H01J2229/00; H01J2229/58; H01J2229/581; H01J2229/583; H01J2229/5835
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
A CATHODE ASSEMBLY COMPRISING A TUBULAR CATHODE SLEEVE HAVING AN ELECTRON EMISSIVE SURFACE AT ONE END AND A TUBULAR CATHODE SUPPORT SLEEVE OF LARGER DIAMETER THAN SAID CATHODE SLEEVE DISPOSED CONCENTRICALLY THEREWITH, SAID CATHODE SUPPORT SLEEVE BEING DIMPLED INWARDLY AT A PULARALITY OF CIRCUMFERENTIALLY SPACED POINTS AND FIXED TO SAID CATHODE SLEEVE THEREAT.
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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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |