Patent US3075839A successfully refreshed from Google Patents.
US3075839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-free austenitic corrosion resistant steels
Assignee: Crucible Steel Company of America
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Filing: 1960-01-05
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Granted: 1963-01-29
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Expires: 1980-01-05
Abstract
No abstract record available.
Inventors
- 👤 Edward J Dulis
- 👤 Maurice J Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:04
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
AN AUSTENITIC STAINLESS STEEL CONSISTING ESSENTIALLY OF ABOUT 14 TO 18% CHROMIUM 0.3 TO 3% MOLYBDENUM, 11 TO 14% MANGANESE, 0.5 TO 1.5% COPPER, UP TO 0.15% CARBON, 0.15 TO 0.55% NITROGEN, THE MININUM CARBON PLUS NITROGEN CONTENT BEING RELATED TO THE CHROMIUM PLUS MOLYBDENUM CONTENT IN ACCORDANCE WITH THE EQUATION, PERCENT (C+N) MIN.=0.075 (PERCENT CR+MO)-15.5) +0.3, BALANCE SUBSTANTIALLY IRON, SAID ALLOY BEING CHARACTERIZED BY A WHOLLY AUSTENITIC STRUCTURE AS QUENCHED
Claim 2
Dependent Claim
71 words
AN AUSTENITIC STAINLESS STEEL CONSISTING ESSENTIALLY OF ABOUT 14 TO 18% CHROMIUM 0.3 TO 3% MOLYBDENUM, 11 TO 14% MANGANESE, 0.5 TO 1.5% COPPER, UP TO 0.15% CARBON, 0.15 TO 0.55% NITROGEN, THE MININUM CARBON PLUS NITROGEN CONTENT BEING RELATED TO THE CHROMIUM PLUS MOLYBDENUM CONTENT IN ACCORDANCE WITH THE EQUATION, PERCENT (C+N) MIN.=0.075 (PERCENT CR+MO)-15.5) +0.3, BALANCE SUBSTANTIALLY IRON, SAID ALLOY BEING CHARACTERIZED BY A WHOLLY AUSTENITIC STRUCTURE AS QUENCHED
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |