US3598574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free cutting stainless steels
Assignee: Daido Steel Co Ltd
•
Filing: 1968-11-05
•
Granted: 1971-08-10
•
Expires: 1988-11-05
Abstract
Abstract A FREE CUTTING STAINLESS STEEL HAVING A CHROMIUM-NICKEL OR CHROMIUM-NICKEL MANGANESE BASE, AND HAVING FROM 0.01-0.06% BY WEIGHT OF CALCIUM THEREIN AS THE FREE CUTTING ELEMENT.
Inventors
- 👤 Tetsuro Ito
- 👤 Goshi Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:59
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |