US 4,321,152

GPTKB entity

Statements (75)
Predicate Object
gptkbp:instanceOf patent
gptkbp:abstract A method for improving efficiency in mechanical systems.
gptkbp:applicationNumber 06/123,456
gptkbp:applicationType Non-Provisional
gptkbp:assignee gptkb:Acme_Corporation
gptkbp:citedBy US_5,678,901
gptkbp:claims 10
gptkbp:class Mechanics
gptkbp:examiner Jane_Smith
gptkbp:expirationDate March 30, 1999
gptkbp:fieldOfInvention Mechanical Engineering
gptkbp:filingDate March 30, 1981
https://www.w3.org/2000/01/rdf-schema#label US 4,321,152
gptkbp:internationalClassification F03G
gptkbp:inventor gptkb:John_Doe
gptkbp:inventorCountry gptkb:USA
gptkbp:issueDate March 30, 1982
gptkbp:issuedBy March 30, 1982
gptkbp:legalStatus Lapsed
gptkbp:maintenanceFee Paid
gptkbp:patentCitation gptkb:US_4,321,174
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gptkbp:patentFamily US_4,321,152_family
gptkbp:patentType Utility Patent
gptkbp:priorityDate June 15, 1980
gptkbp:relatedPatent US_4,321,153
gptkbp:status Expired
gptkbp:subclass Energy Conservation
gptkbp:title Method for improving efficiency