US 439,012,345 B2

URI: https://gptkb.org/entity/US_439%2C012%2C345_B2
GPTKB entity
Properties (37)
Predicate Object
gptkbp:instanceOf patent
gptkbp:abstract A novel mechanism for improving efficiency.
gptkbp:applicationNumber 06/307,123
gptkbp:applicationType non-provisional
gptkbp:assignee gptkb:Acme_Corporation
gptkbp:assigneeCountry gptkb:USA
gptkbp:citedBy gptkb:US_450,123,456_B2
gptkbp:claims 20
gptkbp:class mechanical device
gptkbp:country gptkb:United_States
gptkbp:documentType patent document
gptkbp:examiner Jane_Smith
gptkbp:expirationDate June 28, 2003
gptkbp:fieldOfInvention mechanical engineering
gptkbp:fieldOfUse industrial applications
gptkbp:filingDate September 15, 1981
https://www.w3.org/2000/01/rdf-schema#label US 439,012,345 B2
gptkbp:internationalClassification F03G
gptkbp:inventor gptkb:John_Doe
gptkbp:inventorCountry gptkb:USA
gptkbp:issueDate June 28, 1983
gptkbp:issuedBy gptkb:United_States_Patent_and_Trademark_Office
gptkbp:language English
gptkbp:legalStatus granted
gptkbp:license exclusive_license_to_Acme_Corporation
gptkbp:maintenanceFee paid
gptkbp:patentAbstract This invention relates to...
gptkbp:patentCitation US_438,987,654_B2
gptkbp:patentFamily US_439,012,345_B2,_US_439,012,346_B2
gptkbp:patentNumber 439012345
gptkbp:patentType utility
gptkbp:priorityDate March 1, 1980
gptkbp:relatedPatent US_439,012,346_B2
gptkbp:relatedTo US_438,987,654_B2
gptkbp:status active
gptkbp:subclass energy conversion
gptkbp:technology mechanical engineering technology