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Inventor

Ricardo J. Callejas

Inventor
Maracaibo, VE

Overview

4→
Patents
1981–1995
Patent span
Chemistry
Primary field (CPC C)

Patents· 4 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C07Cprimary
C07CAcyclic or carbocyclic compounds33%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests22%
Y10TTechnical subjects covered by former us classification22%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry11%
C10GCracking hydrocarbon oils11%
PatentTitleYear
5,463,159'Thermal cracking process'19954,545,895'Fractional distillation'19854,251,674'Method and apparatus for improving the selectivity of a process for hydrogenating acetylene to ethylene'19814,249,907'Temperature control of exothermic reactions'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1995Patents assigned to PHILLIPS PETROLEUM CO (4)· patent assignee history
1981Based in Maracaibo, VE· patent location history
1985Based in Sweeney, TX, US· patent location history
1995Based in Sweeny, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
PHILLIPS PETROLEUM CO41981–1995
Locations
LocationPatentsSpan
Maracaibo, VE21981
Sweeny, Texas, US11995
Sweeney, Texas, US11985