US3700485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum vapor deposited zinc coatings
Assignee: Jones and Laughlin Steel Inc
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Filing: 1970-04-10
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Granted: 1972-10-24
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Expires: 1990-04-10
Abstract
Abstract ADHERENT VACUUM VAPOR DEPOSITED ZINC COATINGS ARE PROVIDED FERROUS SUBSTRATES BY INITIALLY VACUUM VAPOR COATING THE SUBSTRATES WITH A FIRST METAL COMPRISING EITHER ALUMINUM OR MAGNESIUM AND THEREAFTER VACUUM VAPOR COATING THE SUBSTRATES WITH ZINC. THE TEMPERATURE OF A SUBSTRATE DURING THE COATING PROCEDURE AND THE ELAPSED TIME BETWEEN APPLICATION OF THE SUCCESSIVE COATINGS ARE CONTROLLED WITHIN CRITICAL LIMITS.
Inventors
- 👤 Robert G Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:55
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/02; C23C14/024; C23C14/025; C23C14/021; C23C14/22; C23C14/54; C23C14/541; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12771; Y10T428/12785; Y10T428/12792
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |