US2851384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of diminishing of ridging in 17-chrome stainless steel
Assignee: Armco Inc
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Filing: 1953-07-03
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Granted: 1958-09-09
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Expires: 1973-07-03
Abstract
No abstract record available.
Inventors
- 👤 James H Waxweiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:16
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C21; C21D; C21D8/00; C21D8/02; C21D8/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
A PROCESS FOR DIMINISHING THE RIDGING CHARACTERISTICS OF FERRITIC STAINLESS STEEL CONTAINING SUBSTANTIALLY 14% TO 18% CHROMIUM AND LESS THAN ABOUT 1.25% NICKEL WHICH COMPRISES CONTROLLING THE AUSTENITE POTENTIAL THEREOF IN ACCORDANCE WITH THE FORMULA:
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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) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |