Patent US3173049A successfully refreshed from Google Patents.
US3173049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing head in cathode ray tube face
Assignee: Unisys Corp
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Filing: 1961-08-14
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Granted: 1965-03-09
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Expires: 1981-08-14
Abstract
No abstract record available.
Inventors
- 👤 Robert E Benn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:15
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/06; H01J31/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A CATHODE RAY TUBE USABLE AS AN ELECTROSTATIC PRINTING HEAD COMPRISING, AN HERMETICALLY SEALED ENVELOPE OF ELECTRICALLY INSULATING MATERIAL, MEANS IN ONE PORTION OF SAID ENVELOPE FOR GENERATING A CATHODE BEAM AND DIRECTING IT TO A SECOND PORTION, A FIRST ELECTRODE EXTENDING THROUGH A WALL OF SAID ENVELOPE AT SAID SECOND PORTION WITH A PORTION THEREOF ON THE INNER SIDE IN A POSITION TO BE IMPINGED BY SAID BEAM, AND ANOTHER PORTION ON THE OUTER SIDE, AND A SECOND ELECTRODE ELECTRICALLY INSULATED FROM THE CATHODE BEAM AND FIXED TO THE EXTERIOR OF SAID ENVELOPE CLOSELY ADJACENT TO THE OUTER PORTION OF SAID FIRST ELECTRODE AND FORMING THEREWITH A PAIR OF ELECTRODES CAPABLE OF PRINTING OR RECORDING ELECTROSTATICALLY ON A RECORD MEDIUM.
Claim 2
Dependent Claim
121 words
A CATHODE RAY TUBE USABLE AS AN ELECTROSTATIC PRINTING HEAD COMPRISING, AN HERMETICALLY SEALED ENVELOPE OF ELECTRICALLY INSULATING MATERIAL, MEANS IN ONE PORTION OF SAID ENVELOPE FOR GENERATING A CATHODE BEAM AND DIRECTING IT TO A SECOND PORTION, A FIRST ELECTRODE EXTENDING THROUGH A WALL OF SAID ENVELOPE AT SAID SECOND PORTION WITH A PORTION THEREOF ON THE INNER SIDE IN A POSITION TO BE IMPINGED BY SAID BEAM, AND ANOTHER PORTION ON THE OUTER SIDE, AND A SECOND ELECTRODE ELECTRICALLY INSULATED FROM THE CATHODE BEAM AND FIXED TO THE EXTERIOR OF SAID ENVELOPE CLOSELY ADJACENT TO THE OUTER PORTION OF SAID FIRST ELECTRODE AND FORMING THEREWITH A PAIR OF ELECTRODES CAPABLE OF PRINTING OR RECORDING ELECTROSTATICALLY ON A RECORD MEDIUM.
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |