US3592633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength low alloy steel possessing sufficient weldability containing small amounts of nb,ti,and b
Assignee: JFE Engineering Corp
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Filing: 1969-01-22
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Granted: 1971-07-13
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Expires: 1989-01-22
Abstract
Abstract HIGH-STRENGTH LOW-ALLOY STEEL KEEPING YIELD STRENGTH OF MORE THAN 70 KG./MM.2 IN A FURTHER COORDINATED RELATIONSHIP WITH SPECIFIC SMALL AMOUNTS OF ALLOYING INGREDIENTS, PARTICULARLY NB+TI+B, AND POSSESSING GOOD TOUGHNESS AND SUFFICIENT WELDABILITY THROUGH AN ORDINARY QUENCHTEMPER HEAT-TREATMENT.
Inventors
- 👤 Tatsumi Osuka
- 👤 Junichi Tanaka
- 👤 Michio Hayashida
- 👤 Yoshiaki Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:48
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/54
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |