Patent US4149093A successfully refreshed from Google Patents.
US3172007A
Expired / Lapsed
US
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Folded filament beam generator
Assignee: Stauffer Chemical Co
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Filing: 1962-01-15
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Granted: 1965-03-02
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Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 Charles W Hanks
- 👤 Maurice E Tyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:18
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/06; H01J37/063; H01J37/30; H01J37/305
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
AN IMPROVED ELECTRON BEAM GENERATOR COMPRISING A FOLDED FILAMENT HAVING TWO ELONGATED ELECTRON EMISSIVE PORTIONS DISPOSED IN CLOSELY SPACED PARALLEL RELATION, CONNECTIONS TO SAID FILAMENT FOR PASSING A LARGE HEATING CURRENT THROUGH SAID FILAMENT ALONG ONE FILAMENT PORTION IN A DIRECTION OPPOSITE TO HEATING CURRENT FLOW IN THE OTHER PORTION, AN ACCELERATING ELECTRODE ADAPTED TO ESTABLISH AN ELECTRON ACCELERATING FIELD EXTENDING TO SAID FILAMENT FOR ATTRACTING EMITTED ELECTRONS THEREFROM, AND MEANS AT LEAST IN PART EXTENDING BETWEEN SAID FILAMENT AND ACCELERATING ELECTRODE LONGITUDINALLY THEREOF, SAID MEANS BEING ADAPTED TO BE MAINTAINED AT SUBSTANTIALLY THE POTENTIAL OF SAID FILAMENT FOR BOWING SAID ACCELERATING FIELD ABOUT SAID MEANS WHEREBY EMITTED ELECTRONS ARE WITHDRAWN IN QUANTITY FROM SAID FILAMENT ONLY ALONG LINES OF FORCE OF SAID ACCELERATING FIELD.
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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |