US3250942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube with improved deflection magnifying screen
Assignee: Sony Corp
•
Filing: 1961-07-26
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Granted: 1966-05-10
•
Expires: 1981-07-26
Abstract
No abstract record available.
Inventors
- 👤 Yoshida Susumu
- 👤 Ohkoshi Akio
- 👤 Nemoto Yasuyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:09
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
AN ELECTRON BEAM DEFLECTION MAGNIFYING MESH SCREEN FOR USE IN A CATHODE RAY TUBE COMRPISING A MESH SCREEN MADE OF AN ELECTRICAL INSULATING MATERIAL HAVING A LAW SECONDARY EMISSION RATIO, A LAYER OF ELECTRICALLY CONDUCTIVE MATERIAL FASTENED TO SAID ELECTRICAL INSULATING MATERIAL, SAID MESH SCREEN BEING ADAPTED TO BE FASTENED TO THE INSIDE OF A CATHODE-RAY TUBE AT THE BASE OF A CONE WITH SAID ELECTRICALLY INSULATING MATERIAL FORMING THE MESH SCREEN SURFACE WHICH FACES IN THE DIRECTION OF THE SUPPLY OF ELECTRONS FOR THE CATHODE RAY TUBE.
Claim 2
Dependent Claim
88 words
AN ELECTRON BEAM DEFLECTION MAGNIFYING MESH SCREEN FOR USE IN A CATHODE RAY TUBE COMRPISING A MESH SCREEN MADE OF AN ELECTRICAL INSULATING MATERIAL HAVING A LAW SECONDARY EMISSION RATIO, A LAYER OF ELECTRICALLY CONDUCTIVE MATERIAL FASTENED TO SAID ELECTRICAL INSULATING MATERIAL, SAID MESH SCREEN BEING ADAPTED TO BE FASTENED TO THE INSIDE OF A CATHODE-RAY TUBE AT THE BASE OF A CONE WITH SAID ELECTRICALLY INSULATING MATERIAL FORMING THE MESH SCREEN SURFACE WHICH FACES IN THE DIRECTION OF THE SUPPLY OF ELECTRONS FOR THE CATHODE RAY TUBE.
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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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |