Inventor
OVALLES CESAR
US24 patents
⚠️ This page may combine multiple inventors who share the name “OVALLES CESAR”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CHEVRON USA INC
10 patentsUS9670760B2Jun 6, 2017
Process for in situ upgrading of a heavy hydrocarbon using asphaltene precipitant additives
CHEVRON USA INC8 citations83
US10137486B1Nov 27, 2018
Systems and methods for thermal treatment of contaminated material
CHEVRON USA INC13 citations78
US10184330B2Jan 22, 2019
Antenna operation for reservoir heating
CHEVRON USA INC2 citations73
US12299863B2May 13, 2025
Coke morphology by image segmentation
CHEVRON USA INC0 citations53
US10865628B2Dec 15, 2020
Antenna operation for reservoir heating
CHEVRON USA INC0 citations52
US10865629B2Dec 15, 2020
Antenna operation for reservoir heating
CHEVRON USA INC0 citations52
US10907473B2Feb 2, 2021
Low volume in-line filtration methods for analyzing hydrocarbon-containing fluid to evaluate asphaltene content and behavior during production operations
CHEVRON USA INC0 citations50
US10975291B2Apr 13, 2021
Method of selection of asphaltene precipitant additives and process for subsurface upgrading therewith
CHEVRON USA INC0 citations44
US12208297B2Jan 28, 2025
Systems and methods for treating contaminated solid material
CHEVRON USA INC0 citations38
US10704371B2Jul 7, 2020
Low dielectric zone for hydrocarbon recovery by dielectric heating
CHEVRON USA INC0 citations33
INTEVEP SA
6 patentsUS5891829AApr 6, 1999
Process for the downhole upgrading of extra heavy crude oil
INTEVEP SA96 citations94
US6171479B1Jan 9, 2001
Microwave heated catalyst and process
INTEVEP SA36 citations90
US6017845AJan 25, 2000
Microwave heated catalyst and process
INTEVEP SA29 citations90
US5269909ADec 14, 1993
Process for treating heavy crude oil
INTEVEP SA25 citations86
US5321187AJun 14, 1994
Catalyst for the direct conversion of methane to higher hydrocarbons and method for the preparation of same
INTEVEP SA4 citations60
US5212139AMay 18, 1993
Catalyst for the direct conversion of methane to higher hydrocarbons and method for the preparation of same
INTEVEP SA3 citations60
OVALLES CESAR
2 patentsUS9255043B2Feb 9, 2016
Liquid crude hydrocarbon composition
OVALLES CESAR9 citations77
US9921205B2Mar 20, 2018
Method for determining the effectiveness of asphaltene dispersant additives for inhibiting or preventing asphaltene precipitation in a hydrocarbon-containing material subjected to elevated temperature and presssure conditions
OVALLES CESAR2 citations69