US3243646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylindrical compensating electrode for electrostatic lens of cathode ray tube
Assignee: Nippon Columbia Co Ltd
•
Filing: 1962-09-06
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Granted: 1966-03-29
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Expires: 1982-09-06
Abstract
No abstract record available.
Inventors
- 👤 Shimizu Kenji
- 👤 Suzuki Hirofumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:51
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H01J29/62; H01J29/622; H01J29/624
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A CATHODE RAY TUBE OF THE SCAN-MAGNIFICATION TYPE INCLUDING AN ELECTRON SOURCE, A SCREEN POSITIONED TO BE BOMBARDED BY THE ELECTRONS FROM SAID SOURCE, A CYLINDRICAL ELECTRODE, AN ACCELERATING ELECTRODE, AND A SCREEN ELECTRODE INTERPOSED BETWEEN SAID CYLINDRICAL ELECTRODE AND SAID ACCELERATING ELECTRODE, THE COMBINATION OF SAID CYLINDRICAL ELECTRODE, ACCELERATING ELECTRODE, AND SCREEN ELECTRODE BEING POSITIONED BETWEEN SAID SOURCE AND SAID SCREEN AND BEING SUPPLIED WITH SUFFICIENT POTENTIAL DIFFERENCES TO PROVIDE TWO ELECTROSTATIC CONCAVE LENSES, THE IMPROVEMENT WHICH COMPRISES A COMPENSATING CYLINDRICAL ELECTRODE CONCENTRIC WITH SAID CYLINDRICAL ELECTRODE, SAID COMPENSATING ELECTRODE BEING AT A SUBSTANTIALLY LOWER POTENTIAL THAN SAID CYLINDRICAL ELECTRODE AND POSITIONED TO FORM AN ELECTROSTATIC CONVEX LENS BETWEEN SAID ELECTROSTATIC CONCAVE LENSES.
Claim 2
Dependent Claim
115 words
IN A CATHODE RAY TUBE OF THE SCAN-MAGNIFICATION TYPE INCLUDING AN ELECTRON SOURCE, A SCREEN POSITIONED TO BE BOMBARDED BY THE ELECTRONS FROM SAID SOURCE, A CYLINDRICAL ELECTRODE, AN ACCELERATING ELECTRODE, AND A SCREEN ELECTRODE INTERPOSED BETWEEN SAID CYLINDRICAL ELECTRODE AND SAID ACCELERATING ELECTRODE, THE COMBINATION OF SAID CYLINDRICAL ELECTRODE, ACCELERATING ELECTRODE, AND SCREEN ELECTRODE BEING POSITIONED BETWEEN SAID SOURCE AND SAID SCREEN AND BEING SUPPLIED WITH SUFFICIENT POTENTIAL DIFFERENCES TO PROVIDE TWO ELECTROSTATIC CONCAVE LENSES, THE IMPROVEMENT WHICH COMPRISES A COMPENSATING CYLINDRICAL ELECTRODE CONCENTRIC WITH SAID CYLINDRICAL ELECTRODE, SAID COMPENSATING ELECTRODE BEING AT A SUBSTANTIALLY LOWER POTENTIAL THAN SAID CYLINDRICAL ELECTRODE AND POSITIONED TO FORM AN ELECTROSTATIC CONVEX LENS BETWEEN SAID ELECTROSTATIC CONCAVE LENSES.
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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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |