US3072820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage-tunable magnetron
Assignee: Varian Medical Systems Inc
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Filing: 1960-04-19
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Granted: 1963-01-08
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Expires: 1980-04-19
Abstract
No abstract record available.
Inventors
- 👤 Donald A Dunn
- 👤 John W Mclaughlin
- 👤 Carl H Turnblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:47
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/04; H01J23/05; H01J25/00; H01J25/50; H01J25/52; H01J25/54; H01J25/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A MAGNETRON COMPRISING AN ANODE HAVING A CYLINDRICAL INTERACTION SPACE THERETHROUGH, AN ELONGATED NONEMITTING ELECTRODE COAXIALLY DISPOSED WITHIN SAID INTERACTION SPACE, AN ELECTRON EMITTING CATHODE SPACED AXIALLY FROM SAID INTERACTION SPACE, A CONTROL ELECTRODE SURROUNDING SAID EMITTING CATHODE, AND A COLLECTOR ELECTRODE SPACED FROM SAID NON-EMITING ELECTRODE IN NON-CONDUCTING ELECTRICAL RELATION THEREWITH AND DISPOSED ON THE SIDE OF SAID ANODE REMOTE FROM SAID ELECTRON EMITTING CATHODE.
Claim 2
Dependent Claim
66 words
A MAGNETRON COMPRISING AN ANODE HAVING A CYLINDRICAL INTERACTION SPACE THERETHROUGH, AN ELONGATED NONEMITTING ELECTRODE COAXIALLY DISPOSED WITHIN SAID INTERACTION SPACE, AN ELECTRON EMITTING CATHODE SPACED AXIALLY FROM SAID INTERACTION SPACE, A CONTROL ELECTRODE SURROUNDING SAID EMITTING CATHODE, AND A COLLECTOR ELECTRODE SPACED FROM SAID NON-EMITING ELECTRODE IN NON-CONDUCTING ELECTRICAL RELATION THEREWITH AND DISPOSED ON THE SIDE OF SAID ANODE REMOTE FROM SAID ELECTRON EMITTING CATHODE.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |