US2984563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steel and method
Assignee: Individual
•
Filing: 1957-12-18
•
Granted: 1961-05-16
•
Expires: 1977-12-18
Abstract
No abstract record available.
Inventors
- 👤 Tanczyn Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:26
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A FULLY AUSTENITIC HEAT-HARDENABLE STAINLESS STEEL OF GOOD HOT-WORKING CHARACTERISTICS AND CONSISTING ESSENTIALLY OF ABOUT 12% TO 18% CHROMIUM, 15% TO 30% NICKEL, 3.00% TO 6.50% SILICON, 1% TO 4.50% MOLYBDENUM, WITH THE SUM OF THE MOLYBDENUM AND SILICON CONTENTS AT LEAST ABOUT 5.5%, CARBON NOT EXCEEDING 0.15%, COPPER UP TO 3%, TUNGSTEN UP TO 3%, COLUMBIUM UP TO 1%, NITROGEN UP TO 0.20%, AND REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
69 words
A FULLY AUSTENITIC HEAT-HARDENABLE STAINLESS STEEL OF GOOD HOT-WORKING CHARACTERISTICS AND CONSISTING ESSENTIALLY OF ABOUT 12% TO 18% CHROMIUM, 15% TO 30% NICKEL, 3.00% TO 6.50% SILICON, 1% TO 4.50% MOLYBDENUM, WITH THE SUM OF THE MOLYBDENUM AND SILICON CONTENTS AT LEAST ABOUT 5.5%, CARBON NOT EXCEEDING 0.15%, COPPER UP TO 3%, TUNGSTEN UP TO 3%, COLUMBIUM UP TO 1%, NITROGEN UP TO 0.20%, AND REMAINDER SUBSTANTIALLY ALL IRON.
References Cited (Backward Citations)
NL53768C
Cited
CA511160A
Cited
US2401580A
Cited
US2553330A
Cited
FR1083154A
Cited
US2839392A
Cited
US2861883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |