US 4,200,001 A

GPTKB entity

Statements (74)
Predicate Object
gptkbp:instanceOf patent
gptkbp:abstract A method for enhancing the efficiency of a chemical process.
gptkbp:applicationNumber US_05/895,123
gptkbp:applicationType Non-Provisional
gptkbp:assignee gptkb:Acme_Corporation
gptkbp:citedBy US_4,500,000_A
gptkbp:class C01B
gptkbp:examiner Jane_Smith
gptkbp:fieldOfInvention Chemical_Engineering
gptkbp:filedIn gptkb:United_States
gptkbp:filingDate 1978-05-01
gptkbp:grantType Full Grant
gptkbp:hasFeature 1997-04-29
1989-04-29
1985-04-29
1993-04-29
2001-04-29
https://www.w3.org/2000/01/rdf-schema#label US 4,200,001 A
gptkbp:internationalClassification C01B32/00
gptkbp:inventor gptkb:John_Doe
gptkbp:inventorCountry gptkb:USA
gptkbp:issueDate 1980-04-29
gptkbp:issuedBy gptkb:United_States_Patent_and_Trademark_Office
gptkbp:legalStatus Lapsed
gptkbp:maintenanceFee Required
gptkbp:numberOfClaims 10
gptkbp:patentCitation US 4,300,000 A
US_5,000,000_A
US_4,200,000_A
US_4,400,000_A
US_4,500,000_A
US_4,600,000_A
US_4,700,000_A
US_4,800,000_A
US_4,900,000_A
US_5,100,000_A
US_5,200,000_A
US_5,300,000_A
US_5,400,000_A
US_5,500,000_A
US_5,600,000_A
US_5,700,000_A
US_5,800,000_A
US_5,900,000_A
US_6,000,000_A
US_6,100,000_A
US_6,200,000_A
US_6,300,000_A
US_6,400,000_A
US_6,500,000_A
US_6,600,000_A
US_6,700,000_A
US_6,800,000_A
US_6,900,000_A
US_7,000,000_A
US_8,000,000_A
US_7,100,000_A
US_7,200,000_A
US_7,300,000_A
US_7,400,000_A
US_7,500,000_A
US_7,600,000_A
US_7,700,000_A
US_7,800,000_A
US_7,900,000_A
gptkbp:patentFamily US_4,200,001_A_family
gptkbp:patentLength 20 years
gptkbp:patentNumber 4200001
gptkbp:patentType Utility Patent
gptkbp:priorityDate 1977-05-01
gptkbp:relatedTo US_4,200,000_A
gptkbp:status Expired
gptkbp:subclass C01B 32/00
gptkbp:title Method for improving efficiency of a process