US3289034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube having an auxiliary electrode between the control grid and the anode electrode
Assignee: US Philips Corp
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Filing: 1966-05-04
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Granted: 1966-11-29
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Expires: 1986-05-04
Abstract
No abstract record available.
Inventors
- 👤 Weber Cornelis
- 👤 Johannes Van Esdonk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:16
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/488; H01J29/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN IMAGE-REPRODUCING DEVICE COMPRISING A CATHODERAY TUBE HAVING A BEAM-FORMING ELECTRODE SYSTEM COMPRISING A CATHODE, A FIRST ANODE, MEANS TO APPLY A POSITIVE POTENTIAL TO SAID ANODE, A DISC-SHAPED CONTROL ELECTRODE HAVING AN APERTURE FOR THE PASSAGE OF THE CATHODE-RAY POSITIONED IN PROXIMITY TO THE CATHODE BETWEEN THE ANODE AND CATHODE, A PLURALITY OF PARALLEL WIRE CONDUCTORS EXTENDING ACROSS SAID APERTURE IN SAID CONTROL ELECTRODE, MEANS TO APPLY TO SAID CONTROL ELECTRODE A POSITIVE POTENTIAL LESS THAN THAT APPLIED TO SAID ANODE, AN AUXILIARY ELECTRODE HAVING AN APERTURE WHOSE DIAMETER IS AT LEAST THREE TIMES THAT OF THE CATHODE-RAY AT THE CONTROL ELECTRODE POSITIONED BETWEEN SAID CONTAOL ELECTRODE AND SAID ANODE, AND MEANS TO APPLY A NEGATIVE POTENTIAL OF MORE THAN -50 VOLTS TO SAID AUXILIARY ELECTRODE.
Claim 2
Dependent Claim
127 words
AN IMAGE-REPRODUCING DEVICE COMPRISING A CATHODERAY TUBE HAVING A BEAM-FORMING ELECTRODE SYSTEM COMPRISING A CATHODE, A FIRST ANODE, MEANS TO APPLY A POSITIVE POTENTIAL TO SAID ANODE, A DISC-SHAPED CONTROL ELECTRODE HAVING AN APERTURE FOR THE PASSAGE OF THE CATHODE-RAY POSITIONED IN PROXIMITY TO THE CATHODE BETWEEN THE ANODE AND CATHODE, A PLURALITY OF PARALLEL WIRE CONDUCTORS EXTENDING ACROSS SAID APERTURE IN SAID CONTROL ELECTRODE, MEANS TO APPLY TO SAID CONTROL ELECTRODE A POSITIVE POTENTIAL LESS THAN THAT APPLIED TO SAID ANODE, AN AUXILIARY ELECTRODE HAVING AN APERTURE WHOSE DIAMETER IS AT LEAST THREE TIMES THAT OF THE CATHODE-RAY AT THE CONTROL ELECTRODE POSITIONED BETWEEN SAID CONTAOL ELECTRODE AND SAID ANODE, AND MEANS TO APPLY A NEGATIVE POTENTIAL OF MORE THAN -50 VOLTS TO SAID AUXILIARY ELECTRODE.
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |