US patent 4,321,657

URI: https://gptkb.org/entity/US_patent_4%2C321%2C657

GPTKB entity

Properties (75)

Predicate	Object
gptkbp:instanceOf	patent
gptkbp:abstract	A method for producing a composite material with high strength and low weight.
gptkbp:applicationDate	August 31, 1982
gptkbp:applicationNumber	06/408,174
gptkbp:applicationType	non-provisional
gptkbp:assignee	gptkb:Heller_Associates,_Inc.
gptkbp:citedBy	gptkb:US_patent_5,123,456 gptkb:US_patent_5,678,910
gptkbp:claims	20
gptkbp:coInventor	gptkb:Jane_Doe
gptkbp:examiner	gptkb:John_Smith
gptkbp:fieldOfUse	composite materials
gptkbp:filedIn	gptkb:United_States
https://www.w3.org/2000/01/rdf-schema#label	US patent 4,321,657
gptkbp:internationalClassification	C08L 23/00
gptkbp:inventiveStep	yes
gptkbp:inventor	gptkb:Robert_A._Heller
gptkbp:issuedOn	March 30, 1982
gptkbp:legalStatus	active
gptkbp:novelty	yes
gptkbp:patentCitation	gptkb:US_patent_4,321,692 gptkb:US_patent_4,321,662 gptkb:US_patent_4,321,670 gptkb:US_patent_4,321,693 gptkb:US_patent_4,321,681 gptkb:US_patent_4,321,685 gptkb:US_patent_4,321,665 gptkb:US_patent_4,321,695 gptkb:US_patent_4,321,675 gptkb:US_patent_4,321,660 gptkb:US_patent_4,321,678 gptkb:US_patent_4,321,688 gptkb:US_patent_4,321,696 gptkb:US_patent_4,321,690 gptkb:US_patent_4,321,682 gptkb:US_patent_4,321,661 gptkb:US_patent_4,321,671 gptkb:US_patent_4,321,679 gptkb:US_patent_4,321,677 gptkb:US_patent_4,321,694 gptkb:US_patent_4,321,668 gptkb:US_patent_4,321,674 gptkb:US_patent_4,321,684 gptkb:US_patent_4,321,680 gptkb:US_patent_4,321,663 gptkb:US_patent_4,321,676 gptkb:US_patent_4,321,691 gptkb:US_patent_4,321,672 gptkb:US_patent_4,321,673 gptkb:US_patent_4,321,700 US patent 4,321,658 US_patent_4,321,659 US_patent_4,321,664 US_patent_4,321,666 US_patent_4,321,667 US_patent_4,321,669 US_patent_4,321,683 US_patent_4,321,686 US_patent_4,321,687 US_patent_4,321,689 US_patent_4,321,697 US_patent_4,321,698 US_patent_4,321,699
gptkbp:patentExpiration	March 30, 1999
gptkbp:patentFamily	Heller_composite_patents
gptkbp:patentNumber	4321657
gptkbp:patentOffice	gptkb:USPTO
gptkbp:patentType	utility patent
gptkbp:priorityDate	March 30, 1981
gptkbp:relatedPatent	US patent 4,321,658 US_patent_4,321,659
gptkbp:relatedTo	gptkb:US_patent_4,123,456
gptkbp:status	expired
gptkbp:technicalField	materials science
gptkbp:title	Method for producing a high strength, low weight composite material