Back to results
US 6,270,727 B1Granted
Analytical crucible
AssigneeLeco Corporation
InventorsJoel C. Mitchell, James L. French
Life of this patent
Estimating the term…
Abstract
An analytical crucible is made of a ceramic material with openings to allow the escape of gaseous byproducts of combustion through the crucible while holding the sample. In a preferred embodiment, the crucible is made of a porous ceramic material having a mean pore diameter of from about 150 to 350 microns. The porous ceramic crucible is manufactured of a mixture of at least about 92% alumina and about 7.5% silica. In one embodiment, the crucible is generally cup-shaped.
Claims17
An analytical crucible comprising:
- a cup-shaped crucible made of a porous ceramic material having a cylindrical side wall, said crucible having a porosity defined by a pore diameter of from about 150 to about 350 microns for allowing the escape of gaseous byproducts of combustion along and through said cylindrical side wall of said crucible for successive analyses.
An analytical crucible comprising:
- a cup-shaped ceramic crucible having a side wall having porous openings along the entire side wall for allowing the escape of gaseous byproducts of combustion through said side wall, wherein said ceramic material has a pore diameter of from about 150 to about 350 microns.
An analytical crucible comprising:
- a cylindrical crucible having a side wall made of a porous ceramic material with a porosity defined by a pore diameter of from about 150 to about 350 microns for allowing the escape of gaseous byproducts of combustion through said side wall.
An analytical crucible comprising:
- a sample supporting crucible having a wall with porous openings therethrough having a diameter of from about 150 to about 300 microns for allowing the escape of gaseous byproducts of combustion through said wall.
Dependencies are inferred from the claim text.