Patent US2881837A successfully refreshed from Google Patents.
Patent US3070440A successfully refreshed from Google Patents.
US3070440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dispersion hardened metals
Assignee: Individual
•
Filing: 1960-04-27
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Granted: 1962-12-25
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Expires: 1980-04-27
Abstract
No abstract record available.
Inventors
- 👤 Nicholas J Grant
- 👤 Klaus M Zwilsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:39
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/10; Y; Y10; Y10S; Y10S75/00; Y10S75/95; Y10S75/951
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A METHOD OF PRODUCING A DISPERSION STRENGHENED METAL CHARACTERIZED BY IMPROVING RESISTANCE TO CREEP AT ELEVATED TEMPERATURES WHICH COMPRISES, PROVIDING A MATRIX METAL OF MELTING POINT AT LEAST ABOUT 800*C. CHARACTERIZED BY A NEGATIVE FREE ENERGY OF FORMATION OF THE OXIDE AT ABOUT 25*C. OF NOT EXCEEDING ABOUT 70,000 CALORIES PER GRAM ATOM OF OXYGEN HAVING ASSOCIATED THEREWITH A UNIFORM DISTRIBUTION OF FINELY DIVIDED DISPERSE REFRACTORY OXIDE PARTICLES CHARACTERIZED BY A CRYSTALLOGRAPHIC PHASE TRANSFORMABLE TO ANOTHER CRYSTALLOGRAPHIC PHASE ATAN ELEVATED TEMPERATURE, SAID REFRACTORY OXIDE BEING ALSO CHARACTERIZED BY A NEGATIVE FREE ENERGY OF FORMATION AT ABOUT 25*C. OF AT LEAST ABOUT 90,000 CALORIES PER GRAM ATOM OF OXYGEN, AND HOT DEFORMING SAID METAL TO A WROUGHT SHAPED AT AN ELEVATED TEMPERATURE BELOW THE TEMPERATURE AT WHICH SAID REFRACTORY OXIDE CRYSTALLOGRAPHICALLY TRANSFORMS TO SAID OTHER PHASE.
Claim 2
Independent Claim
135 words
A METHOD OF PRODUCING A DISPERSION STRENGHENED METAL CHARACTERIZED BY IMPROVING RESISTANCE TO CREEP AT ELEVATED TEMPERATURES WHICH COMPRISES, PROVIDING A MATRIX METAL OF MELTING POINT AT LEAST ABOUT 800*C. CHARACTERIZED BY A NEGATIVE FREE ENERGY OF FORMATION OF THE OXIDE AT ABOUT 25*C. OF NOT EXCEEDING ABOUT 70,000 CALORIES PER GRAM ATOM OF OXYGEN HAVING ASSOCIATED THEREWITH A UNIFORM DISTRIBUTION OF FINELY DIVIDED DISPERSE REFRACTORY OXIDE PARTICLES CHARACTERIZED BY A CRYSTALLOGRAPHIC PHASE TRANSFORMABLE TO ANOTHER CRYSTALLOGRAPHIC PHASE ATAN ELEVATED TEMPERATURE, SAID REFRACTORY OXIDE BEING ALSO CHARACTERIZED BY A NEGATIVE FREE ENERGY OF FORMATION AT ABOUT 25*C. OF AT LEAST ABOUT 90,000 CALORIES PER GRAM ATOM OF OXYGEN, AND HOT DEFORMING SAID METAL TO A WROUGHT SHAPED AT AN ELEVATED TEMPERATURE BELOW THE TEMPERATURE AT WHICH SAID REFRACTORY OXIDE CRYSTALLOGRAPHICALLY TRANSFORMS TO SAID OTHER PHASE.
References Cited (Backward Citations)
US2840891A
Cited
US2894838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |