Patent US2550474A successfully refreshed from Google Patents.
US2550474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stress-aging process
Assignee: General Electric Co
•
Filing: 1948-09-30
•
Granted: 1951-04-24
•
Expires: 1968-09-30
Abstract
No abstract record available.
Inventors
- 👤 Richards H Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:36
CPC Classifications
C; C22; C22F; C22F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD FOR IMPROVING THE PROPERTIES OF AN ALLOY CONSISTING WHOLLY OR IN MAJOR PART OF ONE OR MORE SOLID SOLUTION PHASES WHICH COMPRISES ARTIFICIALLY AGING SAID ALLOY FOR FROM 15 MINUTES TO 20 HOURS AT A TEMPERATURE BELOW BUT WITHIN 100* C. OF THE RECRYSTALLIZATION TEMPERATURE AND UNDER AN EXTERNALLY APPLIED STRESS AT LEAST EQUAL TO THE PROPORTIONAL LIMIT BUT NOT EXCEEDING THE 0.2% OFFSET YIELD STRENGTH OF SAID ALLOY PRIOR TO SAID AGING.
Claim 2
Independent Claim
75 words
THE METHOD FOR IMPROVING THE PROPERTIES OF AN ALLOY CONSISTING WHOLLY OR IN MAJOR PART OF ONE OR MORE SOLID SOLUTION PHASES WHICH COMPRISES ARTIFICIALLY AGING SAID ALLOY FOR FROM 15 MINUTES TO 20 HOURS AT A TEMPERATURE BELOW BUT WITHIN 100* C. OF THE RECRYSTALLIZATION TEMPERATURE AND UNDER AN EXTERNALLY APPLIED STRESS AT LEAST EQUAL TO THE PROPORTIONAL LIMIT BUT NOT EXCEEDING THE 0.2% OFFSET YIELD STRENGTH OF SAID ALLOY PRIOR TO SAID AGING.
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) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |