Patent US3752708A successfully refreshed from Google Patents.
US3752708A
Expired / Lapsed
US
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Corrosion resistant composition and method
Assignee: Heatbath Corp
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Filing: 1971-08-23
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Granted: 1973-08-14
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Expires: 1991-08-23
Abstract
Abstract CORROSION RESISTANT COMPOSITIONS ARE DISCLOSED WHICH COMPRISE A AQUEOUS SOLUTION OF A WATER-SOLUBLE HEXAVALENT CHROMIUM COMPOUND, A WATER-SOLUBLE INORGANIC FLUORINE-CONTAINING COMPOUND, A SOLUBLE RATE EARTH METAL AND A WATER-SOLUBLE MANGANESE SALT. THE METHOD OF IMPARTING A PROTECTIVE FILM TO A METAL SURFACE USING THESE COMPOSITIONS IS ALSO DESCRIBED.
Inventors
- 👤 I Newell
- 👤 W Houlihan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:58
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |