US3585068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromising of ferrous metal substrates
Assignee: Solvay Solutions UK Ltd
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Filing: 1967-06-05
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Granted: 1971-06-15
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Expires: 1987-06-05
Abstract
Abstract A PROCESS FOR CHROMISING FERROUS METAL WORKPIECES AND PARTICULARLY SHEET AND PLATE, WHICH IS CARRIED OUT WHILE THE FERROUS METAL IS COILED OR STACKED IN THE FURNACE. THE FERROUS METAL WORKPIECE IS FIRST COATED WITH AN ADHERENT POROUS CHROMIUM METAL CONTAINING SURFACE. SUBSEQUENTLY A METAL HALIDE-CONTAINING COATING IS APPLIED TO THE POROUS CHRMIUM-CONTAINING SURFACE. A COIL OR STACK IS FORMED WHEREIN THE COATED WORKPIECE OR WORKPIECES HAVE SURFACES IN CONTACT WITH ONE ANOTHER AND THE WORKPIECES ARE THEN CHROMISED IN A FURNACE AT ELEVATED TEMPERATURES.
Inventors
- 👤 Kenneth Urmston Holker
- 👤 Colin Paul Albon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:31
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/48; C25D5/50; C23; C23C; C23C10/00; C23C10/28; C23C10/30; C23C10/32
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |