US3677797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming corrosion resistant films on steel plates
Assignee: Nippon Steel Corp
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Filing: 1970-04-27
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Granted: 1972-07-18
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Expires: 1990-04-27
Abstract
Abstract A PROCESS FOR PRODUCING A SURFACE-TREATED STEEL PLATE HIGH IN THE ANTICORROSIVENESS, PARTICULARLY ADAPTED AS A MATERIAL FOR MAKING CANS, ON THE PRINCIPLE OF THE THERMODECOMPOSING PLATING, WHEREIN THE STEEL PLATE IS COATED WITH AN AQUEOUS SOLUTION CONTAINING NITRATE AND/OR ACETATE OF NI AS THE MAIN COMPONENT THEREOF AND OF OTHER METALS SUCH AS CR, MN, ZN AND AL AS SELECTIVE COMPONENTS AND THEN HEATED AT A CERTAIN RANGE OF TEMPERATURE SO AS TO CAUSE THE THERMODECOMPOSING REACTION TO CAUSE THEREBY A STRONG FILM CONTAINING METALLIC NICKEL AND AT LEAST ONE METAL OXIDE TO FORM ON THE SURFACE OF THE STEEL PLATE.
Inventors
- 👤 Hidejiro Asano
- 👤 Yashichi Ouyagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:15
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/10; C23C18/00; C23C18/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944; Y10T428/12951; Y10T428/12972
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |