Patent US3559277A successfully refreshed from Google Patents.
US3559277A
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US
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Welding process for high-hardenability steel
Assignee: TERNI IND ELETTR
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Filing: 1968-11-15
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Granted: 1971-02-02
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Expires: 1988-11-15
Abstract
Abstract A PROCESS FOR TREATING A HIGH DUTY NOT READILY WELDABLE STEEL TO PROVIDE IT WITH A WELDABLE SURFACE. THE SURFACE IS FIRST BUTTERED WITH A WELDABLE COATING AND THEN THE BUTTERED LAYER IS HOT WORKED WHILE PLASTIC.
Inventors
- 👤 Edmondo Marianeschi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:00
CPC Classifications
B; B23; B23K; B23K1/00; B23K35/00; B23K35/001; B23K35/004; B23K9/00; B23K9/23; C; C21; C21D; C21D9/00; C21D9/50; F; F01; F01D; F01D5/00; F01D5/02; F01D5/06; F01D5/063; B23K2103/00; B23K2103/02; B23K2103/04; C21D2251/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49321
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |