US2695253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of aluminum alloys
Assignee: Individual
•
Filing: 1949-05-06
•
Granted: 1954-11-23
•
Expires: 1969-05-06
Abstract
No abstract record available.
Inventors
- 👤 Schaaber Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:54
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/06; C22C21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR THE ARTIFICIAL AGING OF AN AL-MG-SI ALLOY WHICH SPONTANEOUSLY AGES AT ROOM TEMPERATURE AFTER QUENCHING TO ROOM TEMPERATURE FROM A SOLUTION HEAT TREATMENT TO THE DETRIMENT OF VALUES OBTAINED UPON SUBSEQUENT ARTIFICAL AGING WHICH COMPRISES QUENCHING SAID ALLOY FROM A SOLUTION HEAT TREATMENT TO AN ARTIFICAL AGING TEMPERATURE BETWEEN 120* C. AND 200* C., MAINTAINING SUCH ALLOY AT SUCH TEMPERATURE UNTIL IT HAS REACHED A HARDNESS WHICH IS GREATER THAN THAT WHICH WOULD BE OBTAINED AFTER IMMEDIATELY QUENCHING SAID ALLOY IN WATER TO ROOM TEMPERATURE, STORING SUCH PRELINIMARILY AGED ALLOY AT ROOM TEMPERATURE AND SUBJECTING IT TO AN ARTIFICAL AGING TREATMENT AT ELEVATED TEMPERATURES BEFORE THE STORAGE AT ROOM TEMPERATURES CAUSES AN INCREASE IN THE HARDNESS OF THE ALLOY.
Claim 2
Dependent Claim
122 words
A PROCESS FOR THE ARTIFICIAL AGING OF AN AL-MG-SI ALLOY WHICH SPONTANEOUSLY AGES AT ROOM TEMPERATURE AFTER QUENCHING TO ROOM TEMPERATURE FROM A SOLUTION HEAT TREATMENT TO THE DETRIMENT OF VALUES OBTAINED UPON SUBSEQUENT ARTIFICAL AGING WHICH COMPRISES QUENCHING SAID ALLOY FROM A SOLUTION HEAT TREATMENT TO AN ARTIFICAL AGING TEMPERATURE BETWEEN 120* C. AND 200* C., MAINTAINING SUCH ALLOY AT SUCH TEMPERATURE UNTIL IT HAS REACHED A HARDNESS WHICH IS GREATER THAN THAT WHICH WOULD BE OBTAINED AFTER IMMEDIATELY QUENCHING SAID ALLOY IN WATER TO ROOM TEMPERATURE, STORING SUCH PRELINIMARILY AGED ALLOY AT ROOM TEMPERATURE AND SUBJECTING IT TO AN ARTIFICAL AGING TREATMENT AT ELEVATED TEMPERATURES BEFORE THE STORAGE AT ROOM TEMPERATURES CAUSES AN INCREASE IN THE HARDNESS OF THE ALLOY.
References Cited (Backward Citations)
US1472739A
Cited
US2239744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |