US2697035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free-machining stainless steel and method
Assignee: Armco Inc
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Filing: 1951-12-03
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Granted: 1954-12-14
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Expires: 1971-12-03
Abstract
No abstract record available.
Inventors
- 👤 Jr William Charles Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:31
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
CHROMIUM-NICKEL STAINLESS STEELS DISPLAYING FREEMACHINING QUALITITES, TOGETHER WITH REDUCED TOOL ABRASION AND FREE-CHIPPING QUALITIES COMPRISING ABOUT 18% CHROMIUN, 8% NICKEL, 3% COPPER, A MATERIAL SELECTED
Claim 2
Dependent Claim
25 words
CHROMIUM-NICKEL STAINLESS STEELS DISPLAYING FREEMACHINING QUALITITES, TOGETHER WITH REDUCED TOOL ABRASION AND FREE-CHIPPING QUALITIES COMPRISING ABOUT 18% CHROMIUN, 8% NICKEL, 3% COPPER, A MATERIAL SELECTED
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) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |