Patent US3375342A successfully refreshed from Google Patents.
US3375342A
Expired / Lapsed
US
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Electron beam milling of electrical coatings
Assignee: Sprague Electric Co
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Filing: 1964-09-21
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Granted: 1968-03-26
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Expires: 1984-09-21
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:55
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/02; B24B19/022; B24B19/024; B23; B23K; B23K15/00; B23K15/08; H; H01; H01C; H01C17/00; H01C17/04; H01C17/22; H01C17/24; H01J; H01J37/00; H01J37/30; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099; Y10T29/49117; Y10T29/49124
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A PROCESS FOR PREPARING AN ELECTRIC CIRCUIT MEMBER, COMPRISING PROVIDING A CERAMIC SUPPORT CARRYING A THIN ELECTRICALLY CONDUCTIVE COATING FILM, MILLING OUT A LINEAR GAP IN THE FILM AT A SPEED OF AT LEAST ABOUT 100 INCHES PER MINUTE, THE MILLING BEING EFFECTED WITH A FOCUSED 15 TO 20 KILOVOLT ELECTRON BEAM THAT LEAVES THE MILLED GAP WITH MICROSCOPICALLY STRAIGHT EDGES AND AT THE SAME TIME GLAZES THE SURFACE OF THE CERAMIC EXPOSED AT THE GAP.
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) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |