US patent 5,021,977

GPTKB entity

Statements (58)
Predicate Object
gptkbp:instanceOf patent
gptkbp:abstract A method for producing high purity silicon using a chemical vapor deposition process.
gptkbp:applicationNumber 07/408,155
gptkbp:applicationPublicationNumber WO1990/012345
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_5,123,456
gptkb:US_patent_5,234,567
gptkb:US_patent_5,345,678
gptkbp:country gptkb:United_States
gptkbp:documentType patent document
gptkbp:examiner gptkb:John_Doe
gptkbp:fieldOfUse semiconductors
gptkbp:filingDate March 31, 1989
gptkbp:grantDate June 4, 1991
https://www.w3.org/2000/01/rdf-schema#label US patent 5,021,977
gptkbp:internationalClassification C01B33/38
gptkbp:inventor gptkb:Robert_J._McCarthy
gptkbp:inventorCountry gptkb:USA
gptkbp:issuedOn June 4, 1991
gptkbp:language English
gptkbp:legalStatus patent granted
gptkbp:numberOfClaims 20
gptkbp:patentCitation gptkb:US_patent_4,678,901
gptkb:US_patent_4,567,890
gptkb:US_patent_4,789,012
gptkb:US_patent_4,890,123
US patent 4,901,234
US_patent_4,912,345
US_patent_4,923,456
US_patent_4,934,567
US_patent_4,945,678
US_patent_4,956,789
US_patent_4,967,890
US_patent_4,978,901
US_patent_4,989,012
US_patent_4,990,123
US_patent_4,991,234
US_patent_4,992,345
US_patent_4,993,456
US_patent_4,994,567
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US_patent_4,996,789
US_patent_4,997,890
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gptkbp:patentExpiration June 4, 2008
gptkbp:patentFamily US_patent_family
gptkbp:patentNumber 5,021,977
gptkbp:patentType granted
gptkbp:priorityDate March 31, 1989
gptkbp:relatedTo chemical vapor deposition
energy applications
high purity materials
silicon purification
gptkbp:status active
gptkbp:title Method for producing a high purity silicon