US3718441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming metal-filled ceramics of near theoretical density
Assignee: United States Department of the Army
•
Filing: 1970-11-18
•
Granted: 1973-02-27
•
Expires: 1990-11-18
Abstract
Abstract A method for forming metal-filled ceramics of near theoretical density comprising the positioning of a ceramic compact in a vacuum chamber together with a quantity of the filler metal. The chamber is heated above the melting point of the metal and evacuated to a vacuum pressure of less than 10 6 torr. The vacuum removes the oxide film on the surface of the molten metal, thereby permitting the metal to flow freely into the ceramic void spaces.
Inventors
- 👤 R Landingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:28
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/80; C04B41/81; C04B41/85; C04B41/88
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
13 words
A metal-filled ceramic in accordance with claim 1 wherein the metal is aluminum.
Claim 2
Dependent Claim
13 words
A metal-filled ceramic in accordance with claim 1 wherein the metal is beryllium.
Claim 3
Dependent Claim
13 words
A metal-filled ceramic in accordance with claim 1 wherein the metal is magnesium.
Claim 4
Dependent Claim
13 words
A metal-filled ceramic in accordance with claim 1 wherein the metal is vanadium.
Claim 5
Dependent Claim
13 words
A metal-filled ceramic in accordance with claim 1 wherein the metal is nickel.
Claim 6
Dependent Claim
13 words
A metal-filled ceramic in accordance with claim 1 wherein the metal is chromium.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |