US3139552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charged particle gun with nonspherical emissive surface
Assignee: Raytheon Co
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Filing: 1960-03-07
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Granted: 1964-06-30
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Expires: 1980-03-07
Abstract
No abstract record available.
Inventors
- 👤 George R Brewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:48
CPC Classifications
H; H01; H01J; H01J3/00; H01J3/02; H01J3/029
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
IN AN ELECTRON GUN FOR EMITTING A WELL-COLLIMATED ELECTRON STREAM ALONG A PREDETERMINED LINEAR PATH, A CONCAVE EQUIPOTENTIAL ELECTRON EMISSIVE SURFACE DEFINING A NON-SPHERICAL FIGURE OF REVOLUTION HAVING AN AXIS OF REVOLUTION COINCIDENT WITH SAID PATH, THE INTERSECTION OF SAID SURFACE WITH A PLANE CONTAINING SAID AXIS DEFINING A CURVE EXTENDING CONTINUOUSLY FROM ONE SIDE OF SAID AXIS TO THE OTHER, AND THE CURVATURE OF SAID CURVE DECREASING AS A FUNCTION OF TRANSVERSE DISTANCE FROM SAID CURVE.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |