US3671334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-strength steel having aging properties
Assignee: Jones and Laughlin Steel Inc
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Filing: 1970-08-07
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Granted: 1972-06-20
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Expires: 1990-08-07
Abstract
Abstract STEELS HAVING THE FOLLOWING COMPOSITION: .08 TO .18% CARBON; .3 TO 1.0% MANAGANESE; .01 TO .05% COLUMBIUM; .008 TO .014% NITROGEN; .10% MAXIMUM SILICON; LESS THAN A TOTAL OF APPROXIMATELY .02% OF THE NITRIDE-FORMING ELEMENTS ALUMINUM, ZIRCONIUM, VANADIUM AND TITANIUM; AND THE BALANCE ESSENTIALLY IRON, AFTER APPROPRIATE PROCESSING, HAVE YIELD STRENGTHS OF 50,000 TO 70,000 P.S.I. IN HOT-ROLLED AND COLD-ROLLED CONDITIONS AND YIELD STRENGTHS OF 70,000 TO 90,000 P.S.I. AFTER STRAINING AND AGING.
Inventors
- 👤 John H Bucher
- 👤 John F Held
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:58
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/12; C22C38/001
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |