US3250985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave cavity resonator
Assignee: Varian Medical Systems Inc
•
Filing: 1962-10-23
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Granted: 1966-05-10
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Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 James S Hyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:19
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/32; G01R33/34; G01R33/345; H; H01; H01P; H01P7/00; H01P7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
MICROWAVE APPARATUS COMPRISING: A CAVITY RESONATOR HAVING A SURROUNDING CONDUCTING WALL STRUCTURE, SAID WALL STRUCTURE COMPRISING A SYSTEM OF CONDUCTING MEMBERS FORMED BY A CONTINUOUS HELICAL FILAMENT, SAID HELICAL MEMBERS BEING SPACED FROM EACH OTHER AND EXTENDING IN THE DIRECTION OF FLOW FOR MICROWAVE CURRENTS IN THE DESIRED RESONANT MODE OF SAID CAVITY RESONATOR; MEANS FOR APPLYING A STATIC D.C. FILD TO SAID CAVITY RESONATOR; MEANS FOR MEANS FOR APPLYING A SUPERIMPOSED ALTERNATING MAGNETIC FIELD INTERIOR OF SAID CAVITY RESONATOR, SAID ALTERNATING FIELD THREADING SAID WALL STRUCTURE, THE SPACED-APART CONFIGURATION OF SAID CONDUCTORS BEING INTERRUPTIVE OF CLOSEDCONDUCTING PATHS OF EDDY CURRENTS WHICH TEND TO BE ESTABLISHED IN SAID WALL STRUCTURE BY SAID SUPERIMPOSED FIELD.
Claim 2
Dependent Claim
114 words
MICROWAVE APPARATUS COMPRISING: A CAVITY RESONATOR HAVING A SURROUNDING CONDUCTING WALL STRUCTURE, SAID WALL STRUCTURE COMPRISING A SYSTEM OF CONDUCTING MEMBERS FORMED BY A CONTINUOUS HELICAL FILAMENT, SAID HELICAL MEMBERS BEING SPACED FROM EACH OTHER AND EXTENDING IN THE DIRECTION OF FLOW FOR MICROWAVE CURRENTS IN THE DESIRED RESONANT MODE OF SAID CAVITY RESONATOR; MEANS FOR APPLYING A STATIC D.C. FILD TO SAID CAVITY RESONATOR; MEANS FOR MEANS FOR APPLYING A SUPERIMPOSED ALTERNATING MAGNETIC FIELD INTERIOR OF SAID CAVITY RESONATOR, SAID ALTERNATING FIELD THREADING SAID WALL STRUCTURE, THE SPACED-APART CONFIGURATION OF SAID CONDUCTORS BEING INTERRUPTIVE OF CLOSEDCONDUCTING PATHS OF EDDY CURRENTS WHICH TEND TO BE ESTABLISHED IN SAID WALL STRUCTURE BY SAID SUPERIMPOSED FIELD.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |