US3235378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy steel and articles
Assignee: Armco Inc
•
Filing: 1963-11-14
•
Granted: 1966-02-15
•
Expires: 1983-11-14
Abstract
No abstract record available.
Inventors
- 👤 Paul A Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:13
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/58; C22C38/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
AN ALLOY STEEL HAVING GOOD HOT-ROLLING, GOOD COLDFORMING, GOOD WELDING AND GOOD SCALING RESISTANCE PROPERTIES, SAID STEEL ESSENTIALLY CONSISTING OF ABOUT: 8% TO 16% MANGANESE, 17.0% TO 23.0% CHROMIUM, 5.5% TO 9.5% NICKEL, 20% TO .40% NITROGEN, CARBON NOT EXCEEDING .05%, SILICON UP TO 4.0% OR MORE, AND REMAINDER ESSENTIALLY IRON.
Claim 2
Dependent Claim
51 words
AN ALLOY STEEL HAVING GOOD HOT-ROLLING, GOOD COLDFORMING, GOOD WELDING AND GOOD SCALING RESISTANCE PROPERTIES, SAID STEEL ESSENTIALLY CONSISTING OF ABOUT: 8% TO 16% MANGANESE, 17.0% TO 23.0% CHROMIUM, 5.5% TO 9.5% NICKEL, 20% TO .40% NITROGEN, CARBON NOT EXCEEDING .05%, SILICON UP TO 4.0% OR MORE, AND REMAINDER ESSENTIALLY IRON.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |