US2653210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for providing metallic articles with a protective work surface layer
Assignee: Deutsche Edelstahlwerke AG
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Filing: 1951-02-06
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Granted: 1953-09-22
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Expires: 1971-02-06
Abstract
No abstract record available.
Inventors
- 👤 Becker Gottfried
- 👤 Steinberg Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:13
CPC Classifications
B; B23; B23K; B23K31/00; B23K31/02; B23K31/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
THE METHOD OF UNITING A METALLIC LAYER TO A METALLIC VALVE WHICH INCLUDES SHAPING THE LAYER IN THE FORM OF A RING, POSITIONING THE RING AROUND THE VALVE, ELECTRICALLY HEATING AND MELTING THE LAYER IN A NON-OXIDIZING ATMOSPHERE AND IN A HIGH FREQUENCY ELECTRICAL FIELD CREATED BY AN INDUCTION COIL EMBRACING THE RING, CONTROLLING THE HEATING SO THAT THE BODY OF THE VALVE IS HEATED TO A LESSER EXTENT AND RETAINS ITS SOLID FORM, ROTATING THE VALVE ABOUT ITS AXIS DURING THE HEATING OPERATION, AND WHILE THE METALLIC LAYER IS SOLIDIFYING, PRESSING IT ONTO THE SURFACE OF THE VALVE TO PROVIDE A PROTECTIVE COVERING THEREFOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |