US3672876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ductile corrosion-resistant ferrous alloys containing chromium
Assignee: EIDP Inc
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Filing: 1970-05-04
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Granted: 1972-06-27
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Expires: 1990-05-04
Abstract
Abstract AN IRON, 28%-37% CHROMIUM CONTENT ALLOY IN WHICH POSTWELDING DUCTILITY IS IMPROVED BY THE INCORPORATION OF SMALL AMOUNTS IN THE APPROXIMATE RANGE OF ABOUT 0.1% TO 1.0, OF AL, CU, PT, PD OR AG, OR COMBINATIONS OF AT+CU, AL+AG, AL+V OR AL+CU+V.
Inventors
- 👤 Donald J Sipos
- 👤 Robert F Steigerwald
- 👤 Newell E Whitcomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:49
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |