US2844498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for surfacehardening of steel
Assignee: Individual
•
Filing: 1955-03-09
•
Granted: 1958-07-22
•
Expires: 1975-03-09
Abstract
No abstract record available.
Inventors
- 👤 Mouravieff Nicolas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:19
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/40; C23C8/42; C23C8/44; C23C8/46; C21; C21D; C21D1/00; C21D1/34; C21D1/40; C23C8/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD FOR HARDENING A STEEL SURFACE CONSISTING IN SCANNING THE SAID SURFACE WITH AT LEAST ONE CARBON ELECTRODE IN A MASS OF UNINFLAMMABLE LIQUID, WHILE PASSING AN ELECTRIC CURRENT THROUGH SAID ELECTRODE AND SAID SURFACE SO AS TO GENERATE A TRAVELING ARC, WHEREBY EACH SUCCESSIVE SCANNED AREA OF SAID SURFACE IS HEATED AND TREATED WITH CARBON FROM SAID ELECTRODE AND THEN TEMPERATURE UNDER THE COOLING ACTION OF SAID LIQUID, SAID ELECTRIC CURRENT HAVING SUCH A POWER AND SAID SCANNING BEING EFFECTED AT SUCH A SPEED, THAT IT DETERMINES A SUCCESSION OF ARCS DUE TO CONTACT BREAKS, RESULTING FROM THE IRREGULARITIES OF SAID SURFACE, SAID SURFACE BEING PREVIOUSLY PROVIDED WITH CORRUGATIONS EXTENDING TRANSVERSLY TO THE DIRECTION OF SCANNING OF SAID ELECTRODE SO AS TO REGULATE THE GENERATION OF BREAKING ARCS BY CREATING ARTIFICALLY ADDITIONAL SURFACE IRREGULARITIES.
Claim 2
Independent Claim
136 words
A METHOD FOR HARDENING A STEEL SURFACE CONSISTING IN SCANNING THE SAID SURFACE WITH AT LEAST ONE CARBON ELECTRODE IN A MASS OF UNINFLAMMABLE LIQUID, WHILE PASSING AN ELECTRIC CURRENT THROUGH SAID ELECTRODE AND SAID SURFACE SO AS TO GENERATE A TRAVELING ARC, WHEREBY EACH SUCCESSIVE SCANNED AREA OF SAID SURFACE IS HEATED AND TREATED WITH CARBON FROM SAID ELECTRODE AND THEN TEMPERATURE UNDER THE COOLING ACTION OF SAID LIQUID, SAID ELECTRIC CURRENT HAVING SUCH A POWER AND SAID SCANNING BEING EFFECTED AT SUCH A SPEED, THAT IT DETERMINES A SUCCESSION OF ARCS DUE TO CONTACT BREAKS, RESULTING FROM THE IRREGULARITIES OF SAID SURFACE, SAID SURFACE BEING PREVIOUSLY PROVIDED WITH CORRUGATIONS EXTENDING TRANSVERSLY TO THE DIRECTION OF SCANNING OF SAID ELECTRODE SO AS TO REGULATE THE GENERATION OF BREAKING ARCS BY CREATING ARTIFICALLY ADDITIONAL SURFACE IRREGULARITIES.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |