Patent US2556243A successfully refreshed from Google Patents.
US2556243A
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US
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Means and method of simultaneous hardening of opposite surfaces of thin metallic members
Assignee: Ohio Crankshaft Co
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Filing: 1949-02-23
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Granted: 1951-06-12
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Expires: 1969-02-23
Abstract
No abstract record available.
Inventors
- 👤 John T Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:09
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/06; C21D1/09; C21D1/10; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10S; Y10S148/00; Y10S148/902; Y10S148/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A METHOD OF SUBSTANTIALLY SIMULTANEOUSLY HEAT TREATING FIRST AND SECOND CYLINDER SURFACES ON A CYLINDRICAL MEMBER FORMED OF A QUENCHHARDENABLE MATERIAL, LEAVING THE CENTRAL PORTION BETWEEN THE SURFACES IN A RELATIVELY SOFT STATE, COMPRISING, IN COMBINATION, THE STEP S OF PROGRESSIVELY HEATIONG SAID FIRST SURFACE ABOVE THE CRITICAL TEMPERATURE, SUBSEQUENTLY AND PROGRESSIVELY DIRECTING A QUENCHING MEDIUM ONTO SAID HEATED SURFACE, PROGRESSIVELY HEATING SAID SECOND SURQUENCHING MEDIUM STRIKES SAID FIRST SURFACE AND, SUBSEQUENTLY, QUENCHING SAID SECOND SURFACE.
Claim 2
Independent Claim
76 words
A METHOD OF SUBSTANTIALLY SIMULTANEOUSLY HEAT TREATING FIRST AND SECOND CYLINDER SURFACES ON A CYLINDRICAL MEMBER FORMED OF A QUENCHHARDENABLE MATERIAL, LEAVING THE CENTRAL PORTION BETWEEN THE SURFACES IN A RELATIVELY SOFT STATE, COMPRISING, IN COMBINATION, THE STEP S OF PROGRESSIVELY HEATIONG SAID FIRST SURFACE ABOVE THE CRITICAL TEMPERATURE, SUBSEQUENTLY AND PROGRESSIVELY DIRECTING A QUENCHING MEDIUM ONTO SAID HEATED SURFACE, PROGRESSIVELY HEATING SAID SECOND SURQUENCHING MEDIUM STRIKES SAID FIRST SURFACE AND, SUBSEQUENTLY, QUENCHING SAID SECOND SURFACE.
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) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |