US 4,000,021 B1

GPTKB entity

Properties (54)
Predicate Object
gptkbp:instanceOf patent
gptkbp:abstract A device for improving efficiency.
gptkbp:applicationNumber 05/000,021
gptkbp:applicationType non-provisional
gptkbp:assignee Example Corporation
gptkbp:assigneeCountry gptkb:USA
gptkbp:citedBy US_5,000,000
gptkbp:claims 20
gptkbp:class mechanical device
gptkbp:examiner Jane_Smith
gptkbp:expirationDate 1994-12-28
gptkbp:fieldOfInvention mechanical engineering
gptkbp:fieldOfUse artificial intelligence
telecommunications
renewable energy
automotive applications
energy production
home appliances
industrial applications
medical devices
robotics
safety equipment
sports equipment
energy storage
mechanical systems
smart technology
construction applications
aerospace applications
agricultural applications
marine applications
consumer products
office equipment
environmental technology
gptkbp:filingDate 1975-01-15
https://www.w3.org/2000/01/rdf-schema#label US 4,000,021 B1
gptkbp:internationalClassification F03G
gptkbp:inventor gptkb:John_Doe
gptkbp:inventorResidence gptkb:California
gptkbp:issueDate 1977-12-28
gptkbp:issuedBy gptkb:United_States_Patent_and_Trademark_Office
gptkbp:legalStatus granted
gptkbp:location gptkb:USA
gptkbp:maintenanceFee paid
gptkbp:patentCitation US_3,000,000
US_3,500,000
US_4,000,000
US_3,800,000
US_4,000,019
gptkbp:patentFamily US_4,000,021_B1,_US_4,000,022_B1
gptkbp:patentType utility
gptkbp:priorityDate 1974-01-15
gptkbp:relatedTo gptkb:US_4,000,020_B1
gptkbp:status active
gptkbp:subclass energy efficiency