US3189444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic composition and method of making
Assignee: University of Denver
•
Filing: 1958-07-24
•
Granted: 1965-06-15
•
Expires: 1978-07-24
Abstract
No abstract record available.
Inventors
- 👤 Leonard E Olds
- 👤 Joseph F Nachman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:17
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0047; C22C32/0073; C22C1/00; C22C1/10; C22C1/1036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE METHOD OF MAKING AN ALUMINUM BASE ALLOY OF INCREASED TENSILE STRENGTH WHICH COMPRISES PERFORMING IN A CONTROLLED ATMOSPHERE THE STEPS OF MELTING A FIRST AND A SECOND MASS OF ALUMINUM, ADDING A QUANTITY OF SILICON TO THE FIRST MOLTEN MASS TO FORM A SOLUTION OF SILICON IN ALUMINUM, ADDING THORIUM TO THE SECOND MOLTEN MASS TO FORM A SOLUTION OF THORIUM IN ALUMINUM, MIXING THE FIRST SOLUTION WITH A QUANTITY OF THE SECOND SOLUTION TO PROVIDE SUFFICIENT THORIUM TO REACT WITH SUBSTANTIALLY ALL OF THE SILICON IN THE FIRST SOLUTION TO FORM A PRECIPITATE OF FINE PARTICLES OF THORIUM SILICIDE THROUGHOUT THE MASS OF ALUMINUM, AND COOLING THE MOLTEN MASS RAPIDLY TO SOLIDIFY THE ALUMINUM WITH THE THORIUM SILICIDE PARTICLES DISPERSED THEREIN.
Claim 2
Dependent Claim
36 words
AN ALUMINUM BASE ALLOY COMPRISING ESSENTIALLY APPROXIMATELY 1.7% BY WEIGHT OF THORIUM SILICIDE AND THE BALANCE ALUMINUM PLUS INCIDENTAL IMPURITIES, SAID THORIUM SILICIDE BEING IN THE FORM OF A DISPERSION OF PARTICLES PRECIPITATED WITHIN THE ALUMINUM.
References Cited (Backward Citations)
US570014A
Cited
US1306070A
Cited
US660846A
Cited
US1658186A
Cited
US1570893A
Cited
US1727180A
Cited
US1911078A
Cited
US2025662A
Cited
US2056604A
Cited
US2086604A
Cited
US2123629A
Cited
US2136548A
Cited
US2254170A
Cited
US2580171A
Cited
US2482423A
Cited
US2616800A
Cited
US2793949A
Cited
US2852367A
Cited
US3054671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |