US3705818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of coating rubbing surfaces and elements comprising such surfaces
Assignee: Automobiles Citroen SA
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Filing: 1969-12-31
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Granted: 1972-12-12
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Expires: 1989-12-31
Abstract
Abstract TO INCREASE THE WEAR RESISTANCE OF A ROTARY PISTON ENEGINE CASING ENVELOPE THE INNER SURFACE OF THE ENVELOPE IS COATED BY A KEYING FILM AND THEN A RESISTANT SUB-LAYER OF AN ALLOY OF STEEL AND NICKEL ALUMINIDES, THEN BY A THIN WEAR-RESISTANT LAYER OF NICKEL OR COBALT. THE SUB-LAYER IS FORMED BY FLAME-SPRAYING SIMULTANEOUSLY 90% TO 70% BY VOLUME CARBON STEEL WITH 10% TO 30% OF A MIXUTRE OF EQUAL PARTS OF NICKEL AND ALUMINIUM POWDERS.
Inventors
- 👤 Albert Grosseau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:56
CPC Classifications
F; F02; F02B; F02B53/00; C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; C23C4/067; F02B2730/00; F02B2730/09; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |