US 3839405112 B2

GPTKB entity

Properties (25)
Predicate Object
gptkbp:instanceOf patent
gptkbp:abstract A novel mechanism for improving efficiency.
gptkbp:applicationNumber US_3839405112
gptkbp:assignee gptkb:Acme_Corporation
gptkbp:citedBy gptkb:US_1234567890_B2
gptkbp:claims 20
gptkbp:class mechanical device
gptkbp:description This patent describes a mechanism for...
gptkbp:examiner Jane_Smith
gptkbp:expirationDate 1994-09-24
gptkbp:fieldOfInvention mechanical engineering
gptkbp:filingDate 1974-05-31
https://www.w3.org/2000/01/rdf-schema#label US 3839405112 B2
gptkbp:internationalClassification F03G
gptkbp:inventor gptkb:John_Doe
gptkbp:issueDate 1974-09-24
gptkbp:issuedBy gptkb:United_States_Patent_and_Trademark_Office
gptkbp:legalStatus granted
gptkbp:maintenanceFee paid
gptkbp:patentFamily US_3839405112_B2,_US_3839405113_B2
gptkbp:patentType utility
gptkbp:priorityDate 1973-05-31
gptkbp:relatedTo US_3839405111_B2
gptkbp:status active
gptkbp:subclass energy conversion