US3674544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of coating surfaces and in elements comprising such surfaces
Assignee: Automobiles Citroen SA
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Filing: 1969-12-24
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Granted: 1972-07-04
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Expires: 1989-12-24
Abstract
Abstract THE INNER SURFACE OF A LIGHT ALLOY CRANK-CASE ENVELOPE OF A ROTARY PISTON ENGINE IS COATED BY SPRAYING A WEARRESISTANT LAYER THEREON. CARBON STEEL AND NICKEL ALUMINIDE ARE SPRAYED ON SIMULTANEOUSLY BY AT LEAST TWO OXY-ACETYLENE FLAME OR PLASMA FLAME GUNS. SPHERICAL GRAIN PARTICLES SUCH AS SIC, TIB OR BC CAN BE INCORPORTED.
Inventors
- 👤 Albert Grosseau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:52
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/08; C; C23; C23C; C23C4/00; C23C4/04; C23C4/06
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |