US2789073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat treatment of carbide tips for tools to increase their working life
Assignee: MELVIN F KESTING
•
Filing: 1953-08-24
•
Granted: 1957-04-16
•
Expires: 1973-08-24
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Busch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:01
CPC Classifications
C; C22; C22C; C22C29/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE METHOD OF HEAT TREATING A CARBIDE TIP CONTAINING FINELY DIVIDED CARBIDES SINTERED WITH COBALT TO PROLONG ITS WORKING LIFE, WHICH METHOD CONSISTS IN RAISING THE TEMPERATURE OF A TIP OTHERWISE IN READINESS FOR USE TO AT LEAST THE APPROXIMATE TEMPERATURE OF 2350*F., HOLDING THE TIP AT SUCH TEMPERATURE UNTIL ALL PORTIONS THEREOF ARE SUBSTANTIALLY UNIFORMLY AT SUCH TEMPERATURE AND THEREAFTER QUENCHING THE TIP.
Claim 2
Independent Claim
64 words
THE METHOD OF HEAT TREATING A CARBIDE TIP CONTAINING FINELY DIVIDED CARBIDES SINTERED WITH COBALT TO PROLONG ITS WORKING LIFE, WHICH METHOD CONSISTS IN RAISING THE TEMPERATURE OF A TIP OTHERWISE IN READINESS FOR USE TO AT LEAST THE APPROXIMATE TEMPERATURE OF 2350*F., HOLDING THE TIP AT SUCH TEMPERATURE UNTIL ALL PORTIONS THEREOF ARE SUBSTANTIALLY UNIFORMLY AT SUCH TEMPERATURE AND THEREAFTER QUENCHING THE TIP.
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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |