US3202853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam tube with less than three hundred mils spacing between the target electrode and photocathode electrode
Assignee: RCA Corp
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Filing: 1960-08-16
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Granted: 1965-08-24
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Expires: 1980-08-16
Abstract
No abstract record available.
Inventors
- 👤 Paul K Weimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:21
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/34; H01J31/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A TUBE COMPRISING AN EVACUATED ENVELOPE, AN ELECTRON GUN IN ONE END OF SAID ENVELOPE, A PHOTOEMISSIVE PHOTOCATHODE IN THE OTHER END OF SAID ENVELOPE, A TARGET ELECTRODE SPACED FROM SAID PHOTOCATHODE, THE SPACING BETWEEN SAID TARGET ELECTRODE AND SAID PHOTOCATHODE BEING LESS THAN THIRDY MILLS, AND A TARGET MESH SCREEN BETWEEN SAID TARGET ELECTRODE AND SAID PHOTOCATHODE, SAID MESH SCREEN HAVING A THICKNESS SO AS TO OCCUPY AT LEAST ONETWENTIETH OF SAID SPACING.
Claim 2
Dependent Claim
74 words
A TUBE COMPRISING AN EVACUATED ENVELOPE, AN ELECTRON GUN IN ONE END OF SAID ENVELOPE, A PHOTOEMISSIVE PHOTOCATHODE IN THE OTHER END OF SAID ENVELOPE, A TARGET ELECTRODE SPACED FROM SAID PHOTOCATHODE, THE SPACING BETWEEN SAID TARGET ELECTRODE AND SAID PHOTOCATHODE BEING LESS THAN THIRDY MILLS, AND A TARGET MESH SCREEN BETWEEN SAID TARGET ELECTRODE AND SAID PHOTOCATHODE, SAID MESH SCREEN HAVING A THICKNESS SO AS TO OCCUPY AT LEAST ONETWENTIETH OF SAID SPACING.
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |