US 4,000,321 B2

URI: https://gptkb.org/entity/US_4%2C000%2C321_B2
GPTKB entity
Properties (43)
Predicate Object
gptkbp:instanceOf patent
gptkbp:abstract A device for improving efficiency.
gptkbp:applicationNumber 05/586,123
gptkbp:applicationType non-provisional
gptkbp:assignee gptkb:Acme_Corporation
gptkbp:assigneeCountry gptkb:New_York
gptkbp:citedBy US_5,000,000
gptkbp:claims 20
gptkbp:class mechanical device
gptkbp:country gptkb:United_States
gptkbp:documentType patent grant
gptkbp:examiner Jane_Smith
gptkbp:expirationDate 1994-12-28
gptkbp:fieldOfInvention mechanical engineering
gptkbp:fieldOfUse industrial applications
gptkbp:filingDate 1975-05-30
https://www.w3.org/2000/01/rdf-schema#label US 4,000,321 B2
gptkbp:internationalClassification F03D 1/00
gptkbp:inventor gptkb:John_Doe
gptkbp:inventorResidence gptkb:California
gptkbp:issueDate 1977-12-28
gptkbp:issuedBy gptkb:United_States_Patent_and_Trademark_Office
gptkbp:language English
gptkbp:legalStatus granted
gptkbp:maintenanceFee paid
gptkbp:patentCitation US_3,500,000
US_3,600,000
US_3,700,000
US_3,800,000
US_3,900,000
gptkbp:patentDescription Improved Efficiency Device
gptkbp:patentFamily US_4,000,321
gptkbp:patentNumber 4,000,321
gptkbp:patentType utility
gptkbp:priorityDate 1975-05-30
gptkbp:relatedPatent gptkb:US_4,000,324_B2
gptkb:US_4,000,323_B2
gptkb:US_4,000,320_B2
gptkb:US_4,000,322_B2
gptkb:US_4,000,325_B2
gptkbp:relatedTo US_3,000,000
gptkbp:status active
gptkbp:subclass energy efficiency