US3179515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion strengthened metals
Assignee: Individual
•
Filing: 1960-04-27
•
Granted: 1965-04-20
•
Expires: 1980-04-27
Abstract
No abstract record available.
Inventors
- 👤 Nicholas J Grant
- 👤 Preston Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:44
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/10; C22C1/1078; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
AS A COMPOSITION OF MATTER, A METAL POWDER COMPRISING A DUCTILE MATRIX METAL WHOSE OXIDE HAS A NEGATIVE FREE ENERGY OF FORMATION AT 25*C. RANGING UP TO ABOUT 70,000 CALORIES PER GRAM ATOM OF OXYGEN, THE MATRIX METAL HAVING DISPERSED SUBSTANTIALLY UNIFORMLY THERETHROUGH BY INTERNAL OXIDATION ABOUT 0.1 TO 4 V/O OF FINE PARTICLES OF A HARD REFRACTORY SOLUTE METAL OXIDE OF AVERAGE DIAMETER RANGING UP TO ABOUT 800 ANGSTROMS AND A SURFACE PARAMETER DETERMINED BY THE FORMULA 6F/D AS SURFACE AREA OF SOLUTE METAL OXIDE PER CUBIC CENTIMETER OF MATRIX METAL RANGING FROM ABOUT 60X10**2 TO 4000X10**2 CM.2 WHERE F EQUALS THE VOLUME FRACTION OF THE DISPERSE PHASE AND D EQUALS THE AVERAGE DIAMETER OF SAID OXIDE PHASE IN CENTIMETERS, THE NEGATIVE FREE ENERGY OF FORMATION OF SAID OXIDE PHASE EXCEEDING 120,000 CALORIES PER GRAM ATOM OF OXYGEN AT 25*C., THE DIFFERENCE IN NEGATIVE FREE ENERGY BETWEEN THE MATRIX METAL AND SOLUTE METAL OXIDES BEING AT LEAST 60,000 CALORIES PER GRAM ATOM OF OXYGEN AT 25*C.
Claim 2
Dependent Claim
167 words
AS A COMPOSITION OF MATTER, A METAL POWDER COMPRISING A DUCTILE MATRIX METAL WHOSE OXIDE HAS A NEGATIVE FREE ENERGY OF FORMATION AT 25*C. RANGING UP TO ABOUT 70,000 CALORIES PER GRAM ATOM OF OXYGEN, THE MATRIX METAL HAVING DISPERSED SUBSTANTIALLY UNIFORMLY THERETHROUGH BY INTERNAL OXIDATION ABOUT 0.1 TO 4 V/O OF FINE PARTICLES OF A HARD REFRACTORY SOLUTE METAL OXIDE OF AVERAGE DIAMETER RANGING UP TO ABOUT 800 ANGSTROMS AND A SURFACE PARAMETER DETERMINED BY THE FORMULA 6F/D AS SURFACE AREA OF SOLUTE METAL OXIDE PER CUBIC CENTIMETER OF MATRIX METAL RANGING FROM ABOUT 60X10**2 TO 4000X10**2 CM.2 WHERE F EQUALS THE VOLUME FRACTION OF THE DISPERSE PHASE AND D EQUALS THE AVERAGE DIAMETER OF SAID OXIDE PHASE IN CENTIMETERS, THE NEGATIVE FREE ENERGY OF FORMATION OF SAID OXIDE PHASE EXCEEDING 120,000 CALORIES PER GRAM ATOM OF OXYGEN AT 25*C., THE DIFFERENCE IN NEGATIVE FREE ENERGY BETWEEN THE MATRIX METAL AND SOLUTE METAL OXIDES BEING AT LEAST 60,000 CALORIES PER GRAM ATOM OF OXYGEN AT 25*C.
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |