US3247579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit fabrication method
Assignee: Microwave Electronics Corp
•
Filing: 1964-05-18
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Granted: 1966-04-26
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Expires: 1984-05-18
Abstract
No abstract record available.
Inventors
- 👤 Lueder H Cattermole
- 👤 Harold A Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:45
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016; Y10T29/49117; Y10T29/4981; Y10T29/49995; Y10T29/49996
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE METHOD OF FABRICATING A SLOW WAVE STRUCTURE COMPRISING THE STEPS OF: MACHINING A MANDREL TO FORM GROOVES INTO A SUBSTANTIALLY CIRCULAR GRILLE SHAPE OF A SLOW WAVE CIRCUIT; MASKING THE ENDS OF THE MANDREL; FILLING SAID GROOVES WITH COHERING METAL PARTICLES TO A DEPTH SLIGHTLY GREATER THAN THE DEPTH OF SAID GROOVES AND EXTENDING OVER THE MANDREL; MOUNTING THE COATED GROOVED MANDREL BY THE UNCOATED ENDS FOR TURNING; TURNING SAID MANDREL AND SIMULTANEOULSY MACHINING TO REDUCE THE EXTERIOR SURFACE TO THE DESIRED EXTERNAL DIAMETER FOR THE SLOW WAVE CIRCUIT; DEMOUNTING THE MANDREL AND SLOW WAVE CIRCUIT; SECURING A PLURALITY OF SUPPORT RODS TO THE SLOW WAVE CIRCUIT; AND DISSOLKVING THE MANDREL FROM WITHIN THE SLOW WAVE CIRCUIT.
Claim 2
Independent Claim
118 words
THE METHOD OF FABRICATING A SLOW WAVE STRUCTURE COMPRISING THE STEPS OF: MACHINING A MANDREL TO FORM GROOVES INTO A SUBSTANTIALLY CIRCULAR GRILLE SHAPE OF A SLOW WAVE CIRCUIT; MASKING THE ENDS OF THE MANDREL; FILLING SAID GROOVES WITH COHERING METAL PARTICLES TO A DEPTH SLIGHTLY GREATER THAN THE DEPTH OF SAID GROOVES AND EXTENDING OVER THE MANDREL; MOUNTING THE COATED GROOVED MANDREL BY THE UNCOATED ENDS FOR TURNING; TURNING SAID MANDREL AND SIMULTANEOULSY MACHINING TO REDUCE THE EXTERIOR SURFACE TO THE DESIRED EXTERNAL DIAMETER FOR THE SLOW WAVE CIRCUIT; DEMOUNTING THE MANDREL AND SLOW WAVE CIRCUIT; SECURING A PLURALITY OF SUPPORT RODS TO THE SLOW WAVE CIRCUIT; AND DISSOLKVING THE MANDREL FROM WITHIN THE SLOW WAVE CIRCUIT.
References Cited (Backward Citations)
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |