Patent DE1125091B successfully refreshed from Google Patents.
US3753875A
Expired / Lapsed
US
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Method of treatment of metallic surfaces
Assignee: Centre Stephanois de Recherches Mecaniques Hydromecanique et Frottement SA
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Filing: 1971-06-09
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Granted: 1973-08-21
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Expires: 1991-06-09
Abstract
Abstract A METHOD OF TREATMENT OF METALLIC SURFACES IN ORDER TO IMPROVE THEIR RESISTANCE TO WEAR AND TO SEIZURE CONSISTS OF ELECTROLYZING A PART OF HAVING A METALLIC SURFACE WHICH SERVES AS AN ANODE IN A BATH CONSISTING OF WATER AND ONE OF AMIXTURE OF SALTS CONTAINING AT LEAST ONE ELEMENT BELONGING TO THE GROUP OF ELEMENTS CONSTITUTED BY SULPHUR, SLENIUM, TELLURIUM PHOSPHOROUS, BORON SILICON, FLOURINE, CHLORINE, IODINE, BROMINE, ARSENIC, THE TEMPERATURE OF THE BATH BEING COMPRISED BETWEEN THE AMBIENT TEMPERATURE AND THE BOILING TEMPERATURE OF THE MIXTURE OF SALT OR SALTS AND THE WATER. THE BATH MAY BE COMPOSED OF A MIXTURE OF WATER WITH ALKALINE SULPHIDES, THIOCYANATES OR IODIDES.
Inventors
- 👤 P Douet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:06
CPC Classifications
C; C25; C25D; C25D9/00; C25D9/04; C25D9/06
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |