US3446679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion-strengthened nickel-chromium foil
Assignee: Fansteel Inc
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Filing: 1966-06-30
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Granted: 1969-05-27
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Expires: 1986-06-30
Abstract
No abstract record available.
Inventors
- 👤 Harold G Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0026; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/055; C22F; C22F1/00; C22F1/10; Y; Y10; Y10S; Y10S75/00; Y10S75/95; Y10S75/951; Y10T; Y10T29/00; Y10T29/30; Y10T29/301; Y10T29/302; Y10T428/00; Y10T428/12; Y10T428/12431
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A DISPERSION-HARDENED NICKEL-CHROMIUM FOIL COMPRISING NICKEL AND ABOUT 10 TO 30% BY WEIGHT OF CHROMIUM, SAID METAL HAVING PERVASIVELY DISPERSED THEREIN ABOUT FROM 0.1 TO 6% BY VOLUME OF PARTICLES OF A REFRACTORY METAL OXIDE HAVING A FREE ENERGY OF FORMATION AT 1000* C. GREATER THAN ABOUT 100 KILOCALORIES PER GRAM ATOM OF OXYGEN AND AN AVERAGE PARTICLE SIZE LESS THAN ABOUT 80 MILLIMICRONS, SAID FOIL BEING LESS THAN 0.010 INCH THICK AND CHARACTERIZED BY GOOD ROOM TEMPERATURE DUCTILITY AND HIGH TEMPERATURE STRENGTH, AND BY HAVING BOTH (A) ELONGATED GRAINS HAVING A LENGTH-TO-THICKNESS RATIO GREATER THAN ABOUT 2 AND A GRAIN THICKNESS IN THE RANGE OF ABOUT FROM 15 TO 200 MICRONS AND (B) EQUIAXED GRAINS HAVING AN AVERAGE THICKNESS OF ABOUT FROM 10 TO 80 MICRONS, SAID EQUIAXED GRAINS HAVING ANNEALING TWINS.
Claim 2
Dependent Claim
133 words
A DISPERSION-HARDENED NICKEL-CHROMIUM FOIL COMPRISING NICKEL AND ABOUT 10 TO 30% BY WEIGHT OF CHROMIUM, SAID METAL HAVING PERVASIVELY DISPERSED THEREIN ABOUT FROM 0.1 TO 6% BY VOLUME OF PARTICLES OF A REFRACTORY METAL OXIDE HAVING A FREE ENERGY OF FORMATION AT 1000* C. GREATER THAN ABOUT 100 KILOCALORIES PER GRAM ATOM OF OXYGEN AND AN AVERAGE PARTICLE SIZE LESS THAN ABOUT 80 MILLIMICRONS, SAID FOIL BEING LESS THAN 0.010 INCH THICK AND CHARACTERIZED BY GOOD ROOM TEMPERATURE DUCTILITY AND HIGH TEMPERATURE STRENGTH, AND BY HAVING BOTH (A) ELONGATED GRAINS HAVING A LENGTH-TO-THICKNESS RATIO GREATER THAN ABOUT 2 AND A GRAIN THICKNESS IN THE RANGE OF ABOUT FROM 15 TO 200 MICRONS AND (B) EQUIAXED GRAINS HAVING AN AVERAGE THICKNESS OF ABOUT FROM 10 TO 80 MICRONS, SAID EQUIAXED GRAINS HAVING ANNEALING TWINS.
References Cited (Backward Citations)
US3346427A
Cited
US3388010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |