Patent US3202863A successfully refreshed from Google Patents.
US3202863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crossed field collector
Assignee: Varian Medical Systems Inc
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Filing: 1960-09-19
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Granted: 1965-08-24
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Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Donald A Dunn
- 👤 Peter A Sturrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:01
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/027; H01J23/0275
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
AN ELECTRON TUBE COMPRISING MEANS FOR FORMING AN ELECTRON BEAM, MEANS FOR INTERACTING WITH SAID BEAM, AND MEANS FOR COLLECTING THE ELECTRONS IN THE BEAM, ARRANGED ALONG A COMMON STRAIGHT AXIS IN THE ORDER NAMED, SAID COLLECTING MEANS COMPRISING A PLURALITY OF SEMICYLINDRICAL ELECTRICALLY CONDUCTIVE SEGMENTS FOR COLLECTING ELECTRONS IN THE BEAM, SAID ELECTRICALLY CONDUCTIVE SEGMENTS BEING INSULATED FROM EACH OTHER AND SPACED ON OPPOSITE SIDES OF SAID STRAIGHT AXIS, AND MAGNETIC POLE PIECES OF OPPOSITE POLARITY POSITIONED ON OPPOSITE SIDES OF THE BEAM AXIS AT THE SAME REGION ALONG THE BEAM AS SAID CONDUCTIVE SEGMENTS AND SPACED AROUND THE BEAM AXIS SUBSTANTIALLY 90 DEGREES WITH RESPECT TO SAID CONDUCTIVE SEGMENTS, AND AN ELECTRICALLY CONDUCTIVE END MEMBER ON SAID STRAIGHT AXIS AND ELECTRICALLY INSULATED FROM SAID CONDUCTIVE SEGMENTS.
Claim 2
Dependent Claim
128 words
AN ELECTRON TUBE COMPRISING MEANS FOR FORMING AN ELECTRON BEAM, MEANS FOR INTERACTING WITH SAID BEAM, AND MEANS FOR COLLECTING THE ELECTRONS IN THE BEAM, ARRANGED ALONG A COMMON STRAIGHT AXIS IN THE ORDER NAMED, SAID COLLECTING MEANS COMPRISING A PLURALITY OF SEMICYLINDRICAL ELECTRICALLY CONDUCTIVE SEGMENTS FOR COLLECTING ELECTRONS IN THE BEAM, SAID ELECTRICALLY CONDUCTIVE SEGMENTS BEING INSULATED FROM EACH OTHER AND SPACED ON OPPOSITE SIDES OF SAID STRAIGHT AXIS, AND MAGNETIC POLE PIECES OF OPPOSITE POLARITY POSITIONED ON OPPOSITE SIDES OF THE BEAM AXIS AT THE SAME REGION ALONG THE BEAM AS SAID CONDUCTIVE SEGMENTS AND SPACED AROUND THE BEAM AXIS SUBSTANTIALLY 90 DEGREES WITH RESPECT TO SAID CONDUCTIVE SEGMENTS, AND AN ELECTRICALLY CONDUCTIVE END MEMBER ON SAID STRAIGHT AXIS AND ELECTRICALLY INSULATED FROM SAID CONDUCTIVE SEGMENTS.
References Cited (Backward Citations)
No citation records indexed.
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 |