US patent 5,021,962

GPTKB entity

Statements (24)
Predicate Object
gptkbp:instanceOf patent
gptkbp:abstract A method for producing high purity silicon from silicon dioxide.
gptkbp:applicationNumber 07/370,174
gptkbp:applicationType utility
gptkbp:assignee The_United_States_of_America_as_represented_by_the_Department_of_Energy
gptkbp:citedBy gptkb:US_patent_5,456,789
gptkb:US_patent_5,123,999
gptkb:US_patent_5,234,123
gptkb:US_patent_5,345,000
gptkbp:documentType patent document
gptkbp:examiner gptkb:John_Doe
gptkbp:fieldOfUse semiconductors
https://www.w3.org/2000/01/rdf-schema#label US patent 5,021,962
gptkbp:internationalClassification C01B33/38
gptkbp:inventor gptkb:Robert_J._McCarthy
gptkbp:issuedOn June 4, 1991
gptkbp:legalStatus granted
gptkbp:location gptkb:United_States
gptkbp:numberOfClaims 20
gptkbp:patentFamily US_patent_family_5,021,962
gptkbp:priorityDate March 31, 1989
gptkbp:relatedTo silicon production technology
gptkbp:status expired
gptkbp:title Method for producing a high purity silicon