US2604419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat-treating surface hardened articles
Assignee: Ohio Crankshaft Co
•
Filing: 1949-04-07
•
Granted: 1952-07-22
•
Expires: 1969-04-07
Abstract
No abstract record available.
Inventors
- 👤 Anton W Herbenar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:47
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE METHOD OF HEAT TREATING A METALLIC ARTICLE OF MANUFACTURE FOR THE PURPOSE OF DRAWING A PREVIOUSLY HARDENED SURFACE LAYER PORTION THEREOF, SAID ARTICLE HAVING A BODY PORTION AND A SURFACE LAYER PORTION ON EACH SIDE OF SAID BODY PORTION, ONE OF SAID SURFACE LAYER PORTIONS BEING PREVIOUSLY HARDENED, WHICH COMPRISES SUBSEQUENTLY APPLYING HEAT TO SAID OTHER SURFACE LAYER PORTION TO RAISE THE TEMPERATURE THEREOF ABOVE THE TEMPERATURE OF SAID OTHER PORTIONS OF SAID ARTICLE TO CONDUCT SAID HEAT THROUGH SAID BODY PORTION AND INTO SAID PREVIOUSLY HARDENED SURFACE LAYER PORTION TO DRAW SAID LAST PORTION.
Claim 2
Independent Claim
96 words
THE METHOD OF HEAT TREATING A METALLIC ARTICLE OF MANUFACTURE FOR THE PURPOSE OF DRAWING A PREVIOUSLY HARDENED SURFACE LAYER PORTION THEREOF, SAID ARTICLE HAVING A BODY PORTION AND A SURFACE LAYER PORTION ON EACH SIDE OF SAID BODY PORTION, ONE OF SAID SURFACE LAYER PORTIONS BEING PREVIOUSLY HARDENED, WHICH COMPRISES SUBSEQUENTLY APPLYING HEAT TO SAID OTHER SURFACE LAYER PORTION TO RAISE THE TEMPERATURE THEREOF ABOVE THE TEMPERATURE OF SAID OTHER PORTIONS OF SAID ARTICLE TO CONDUCT SAID HEAT THROUGH SAID BODY PORTION AND INTO SAID PREVIOUSLY HARDENED SURFACE LAYER PORTION TO DRAW SAID LAST PORTION.
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) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |