US3563729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free-machining corrosion-resistant stainless steel
Assignee: Crucible Materials Corp
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Filing: 1968-04-16
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Granted: 1971-02-16
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Expires: 1988-04-16
Abstract
Abstract THIS INVENTION RELATES TO AN AUSTENITIC STAINLESS STEEL HAVING IMPROVED MACHINABILITY WITHOUT SACRIFICE IN CORROSION RESISTANCE, SUCH BEING ACHIEVED BY THE ADDITION OF SULFUR WITHIN A CRITICAL RANGE OF 0.04 TO 0.07 PERCENT. D R A W I N G
Inventors
- 👤 Curtis W Kovach
- 👤 Arthur Moskowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:31
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/60; C22C38/18; C22C38/40
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |