US3711311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing portions of coating by glow discharge
Assignee: Comadur SA
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Filing: 1967-08-07
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Granted: 1973-01-16
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Expires: 1987-08-07
Abstract
Abstract LUBRICATING OIL IS RELIABLY CONFINED TO A WORKPIECE PORTION BY MEANS OF A BARRIER CONSISTING OF AN OIL REPELLING LAYER COATED ON THE WORKPIECE AROUND SAID PORTION THEREOF. FIRSTLY, THE WHOLE WORKPIECE IS COATED WITH THE OIL REPELLING LAYER. THIS LAYER IS THEN REMOVED FROM SAID PORTION BY EXPOSING THE LATTER AT A PLACE WHERE IT WILL BE HIT BY AN ELECTRICAL DISCHARGE WHICH CROSSES THE GAP BETWEEN TWO ELECTRODES WITH A SUBSTANTIALLY CONSTANT INTENSITY AND WITHOUT SPARKLING.
Inventors
- 👤 R Esseiva
- 👤 L Perrin
- 👤 L Romang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:17
CPC Classifications
F; F16; F16N; F16N1/00; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10
Claims Analysis
Total Claims: 0
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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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |