US3832293A
Expired / Lapsed
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Process for forming a coating comprising a silicate on valve group metals
Assignee: D & M Technologies
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Filing: 1973-03-01
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Granted: 1974-08-27
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Expires: 1993-03-01
Abstract
Abstract METALS AND ALLOYS WHICH HAVE THE PROPERTY OF ELECTOLYTIC RECTIFICATION ARE COATED BY IMMERSION IN AN AQUEOUS BATH COMPRISING AN ALKALI METAL HYDROXIDE, AN ALKALI METAL SILICATE AND A CATALYST AND APPLICATION OF A SUFFICIENTLY HIGH VOLTAGE TO OBTSIN SPARK DISCHARGE AT THE SURFACE TO BE COATED THEREBY TO PROVIDE A DURABLE COATING ON THE SURFACE.
Inventors
- 👤 R Hradcovsky
- 👤 S Bayles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:54
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0029; H01G9/0032; C; C25; C25D; C25D5/00; C25D5/627; C25D9/00; C25D9/04; C25D9/08; C25D9/12
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |