US3165402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy steel and method of heat treatment therefor
Assignee: Finkl A and Sons Co
•
Filing: 1961-06-26
•
Granted: 1965-01-12
•
Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 William F Finkl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:11
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A METHOD OF DEVELOPING SUBSTANTIALLY UNIFORM HARDNESS IN A PIECE OF STEEL OF LARGE CROSS SECTION BY HEAT TREATMENT, THE COMPOSITION OF SAID STEEL BEING SUBSTANTIALLY AS FOLLOWS IN PERCENT BY WEIGHT:
Claim 2
Independent Claim
32 words
A METHOD OF DEVELOPING SUBSTANTIALLY UNIFORM HARDNESS IN A PIECE OF STEEL OF LARGE CROSS SECTION BY HEAT TREATMENT, THE COMPOSITION OF SAID STEEL BEING SUBSTANTIALLY AS FOLLOWS IN PERCENT BY WEIGHT:
References Cited (Backward Citations)
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Cited
US2012765A
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US2279716A
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US2291943A
Cited
US2666697A
Cited
US2921849A
Cited
US2996376A
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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) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |