Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6453976 | Lost foam countergravity casting | Qi-Jun Zhao | 2002-09-24 |
| 6283195 | Passivated titanium aluminide tooling | Curtis A. Harrison, Qi-Jun Zhao | 2001-09-04 |
| 6189598 | Lost foam casting without fold defects | Qi-Jun Zhao | 2001-02-20 |
| 6004368 | Melting of reactive metallic materials | Ronald E. Erickson, Paul J. Tousignant | 1999-12-21 |
| 5607007 | Directional solidification apparatus and method | — | 1997-03-04 |
| 5340419 | Method and apparatus for densifying an article | — | 1994-08-23 |
| 5303762 | Countergravity casting apparatus and method | — | 1994-04-19 |
| 5299619 | Method and apparatus for making intermetallic castings | Merton C. Flemings | 1994-04-05 |
| 5271451 | Metal casting using a mold having attached risers | John A. Redemske | 1993-12-21 |
| 5161604 | Differential pressure, countergravity casting with alloyant reaction chamber | Bryant W. Crocker | 1992-11-10 |
| 5146973 | Countergravity casting method and apparatus | — | 1992-09-15 |
| 5069271 | Countergravity casting using particulate supported thin walled investment shell mold | Richard T. Carter | 1991-12-03 |
| 5042561 | Apparatus and process for countergravity casting of metal with air exclusion | — | 1991-08-27 |
| 4982777 | Countergravity casting method and apparatus | — | 1991-01-08 |
| 4977948 | Countergravity casting apparatus and method using elastomeric sealing gasket and cooled vacuum chamber | — | 1990-12-18 |
| 4957153 | Countergravity casting apparatus and method | — | 1990-09-18 |
| 4874029 | Countergravity casting process and apparatus using destructible patterns suspended in an inherently unstable mass of particulate mold material | — | 1989-10-17 |
| 4862946 | Vacuum countergravity casting apparatus and method | — | 1989-09-05 |
| 4858672 | Countergravity casting apparatus and method | — | 1989-08-22 |
| 4791977 | Countergravity metal casting apparatus and process | — | 1988-12-20 |
| 4754798 | Casting metal in a flowable firmly set sand mold cavity | Rodney G. Riek | 1988-07-05 |
| 4651799 | Vented casting molds and process of making the same | — | 1987-03-24 |
| 4606396 | Sand mold and apparatus for reduced pressure casting | Richard L. Sharkey | 1986-08-19 |
| 4589466 | Metal casting | Eugene W. Thomas | 1986-05-20 |
| 4532976 | Gas permeable metal casting mold having gas collection voids | — | 1985-08-06 |