US2809139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for heat treating chromium base alloy
Assignee: Research Corp
•
Filing: 1952-10-24
•
Granted: 1957-10-08
•
Expires: 1972-10-24
Abstract
No abstract record available.
Inventors
- 👤 David S Bloom
- 👤 Nicholas J Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:52
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/06; C22F; C22F1/00; C22F1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE METHOD WHICH COMPRISES HEATING AN ALLOY OF THE CHROMIUM-NICKEL SYSTEM CONTAINING CHROMIUM IN AN AMOUNT SUFFICIENT TO BE TRANSFORMABLE IN A MATERIALLY SIGNIFICANT PROPORTION TO THE BETA PHASE, TO A TEMPRATURE ABOVE THE TRANSITION TEMPERATURE AT WHICH A SUBSTANTIAL PROPORTION OF THE CHROMIUM PRESENT IN SAID ALLOY IS TRANSFORMED TO TEH BETA PHASE, AND THEREAFTER RAPIDLY QUENCHING SAID ALLOY TO RETAIN A SUBSTANTIAL PORTION OF BETA PHASE CHROMIUM THEREIN.
Claim 2
Independent Claim
70 words
THE METHOD WHICH COMPRISES HEATING AN ALLOY OF THE CHROMIUM-NICKEL SYSTEM CONTAINING CHROMIUM IN AN AMOUNT SUFFICIENT TO BE TRANSFORMABLE IN A MATERIALLY SIGNIFICANT PROPORTION TO THE BETA PHASE, TO A TEMPRATURE ABOVE THE TRANSITION TEMPERATURE AT WHICH A SUBSTANTIAL PROPORTION OF THE CHROMIUM PRESENT IN SAID ALLOY IS TRANSFORMED TO TEH BETA PHASE, AND THEREAFTER RAPIDLY QUENCHING SAID ALLOY TO RETAIN A SUBSTANTIAL PORTION OF BETA PHASE CHROMIUM THEREIN.
References Cited (Backward Citations)
US1357550A
Cited
US1698935A
Cited
US1774862A
Cited
US2238160A
Cited
GB541055A
Cited
US2297687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |