US2547775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent color screen for electron optical systems
Assignee: RCA Corp
•
Filing: 1946-01-23
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Granted: 1951-04-03
•
Expires: 1966-01-23
Abstract
No abstract record available.
Inventors
- 👤 Edward G Ramberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:29
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/30; H01J29/32; H01J29/187
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A COLOR-SELECTIVE ELECTRON MICROSCOPE COMPRISING AN ELECTRON GUN FOR GENERATING AN ELECTRON BEAM, A SPECIMEN IN THE PATH OF SAID BEAM HAVING DIFFERENT PORTIONS WHICH VARY DIFFERENTLY THE VELOCITY OF ELECTRONS CONSTITUTING SAID BEAM, AND PAIR OF SCREENS OF FLUORESCENT MATERIALS HAVING DIFFERENT ELECTRON-FLUORESCENT COLOR CHARACTERISTICS RESPONSIVE TO PREDETERMINED DIFFERENT IRRADIATING ELECTRON VELOCITIES, ONE OF SAID SCREENS BEING SUPERIMPOSED UPON THE OTHER, AND MEANS FOR DIRECTING SAID VELOCITY-CONTROLLED ELECTRON BEAM UPON SAID SCREENS.
Claim 2
Dependent Claim
73 words
A COLOR-SELECTIVE ELECTRON MICROSCOPE COMPRISING AN ELECTRON GUN FOR GENERATING AN ELECTRON BEAM, A SPECIMEN IN THE PATH OF SAID BEAM HAVING DIFFERENT PORTIONS WHICH VARY DIFFERENTLY THE VELOCITY OF ELECTRONS CONSTITUTING SAID BEAM, AND PAIR OF SCREENS OF FLUORESCENT MATERIALS HAVING DIFFERENT ELECTRON-FLUORESCENT COLOR CHARACTERISTICS RESPONSIVE TO PREDETERMINED DIFFERENT IRRADIATING ELECTRON VELOCITIES, ONE OF SAID SCREENS BEING SUPERIMPOSED UPON THE OTHER, AND MEANS FOR DIRECTING SAID VELOCITY-CONTROLLED ELECTRON BEAM UPON SAID SCREENS.
References Cited (Backward Citations)
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Cited
US2058914A
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US2177691A
Cited
US2219929A
Cited
US2243828A
Cited
US2455710A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |