Patent US3131324A successfully refreshed from Google Patents.
US3131324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron-gun assembly for cathode-ray signal-storage tubes
Assignee: Fairchild Semiconductor Corp
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Filing: 1961-11-13
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Granted: 1964-04-28
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Expires: 1981-11-13
Abstract
No abstract record available.
Inventors
- 👤 Robert J Madden
- 👤 Gendre Victor Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:39
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
AN ELECTRON-GUN ASSEMBLY FOR A CATHODE-RAY SIGNALSTORAGE TUBE INCLUDING ELECTROSTATIC DEFLECTION PLATES AND A SIGNAL-STORAGE GRID COMPRISING; A WRITING GUN FOR SCANNING SAID GRID INCLUDING AN ELECTRON-BEAM SOURCE AND A FIRST ACCELERATING ELECTRODE MEMBER RELATIVELY POSITIONED TO BE DISPOSED ON OPPOSITE SIDES AXIALLY OF THE DEFLECTION PLATES, SAID ACCELERATING ELECTRODE MEMBER BEING DIMENSIONED EFFECTIVELY TO SHIELD THE DEFLECTION PLATES FROM ALL AXIALLY FOLLOWING TUBE ELEMENTS; AND A FLOOD GUN FOR FLOODING SAID GRID INCLUDING AN ELECTRON-BEAM SOURCE POSITIONED AXIALLY APPROXIMATELY COINCINDENTLY WITH SAID ACCELERATING ELECTRODE MEMBER AND A SECOND ACCELERATING ELECTRODE MEMBER POSITIONED AXIALLY BEYOND SAID FIRST ACCELERATING ELECTRODE MEMBER, WHEREBY THE DEFLECTION PLATES ARE ELECTRICALLY SHIELDED FROM THE FLOOD-GUN BEAM.
Claim 2
Dependent Claim
111 words
AN ELECTRON-GUN ASSEMBLY FOR A CATHODE-RAY SIGNALSTORAGE TUBE INCLUDING ELECTROSTATIC DEFLECTION PLATES AND A SIGNAL-STORAGE GRID COMPRISING; A WRITING GUN FOR SCANNING SAID GRID INCLUDING AN ELECTRON-BEAM SOURCE AND A FIRST ACCELERATING ELECTRODE MEMBER RELATIVELY POSITIONED TO BE DISPOSED ON OPPOSITE SIDES AXIALLY OF THE DEFLECTION PLATES, SAID ACCELERATING ELECTRODE MEMBER BEING DIMENSIONED EFFECTIVELY TO SHIELD THE DEFLECTION PLATES FROM ALL AXIALLY FOLLOWING TUBE ELEMENTS; AND A FLOOD GUN FOR FLOODING SAID GRID INCLUDING AN ELECTRON-BEAM SOURCE POSITIONED AXIALLY APPROXIMATELY COINCINDENTLY WITH SAID ACCELERATING ELECTRODE MEMBER AND A SECOND ACCELERATING ELECTRODE MEMBER POSITIONED AXIALLY BEYOND SAID FIRST ACCELERATING ELECTRODE MEMBER, WHEREBY THE DEFLECTION PLATES ARE ELECTRICALLY SHIELDED FROM THE FLOOD-GUN BEAM.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |