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For the Inventor, By the Inventor

Houston, TX, United States of America

Pennzoil-quaker State


USPTO Granted Patents = 2

Forward Citations = 21

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2 inventors (with patents filed for the assignee):

goldMedal Jiafu Fang (1 out of 14 patents)

silverMedal Douglas Meyers (1 out of 1 patent)


2 patents:

1. 6217745 - Method for monitoring agents in hydrocarbon fluids (2001-04-17),
2. 6172014 - Method of lubricating compression cylinders used in the manufacture of high-pressure polyethylene (2001-01-09),
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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#1,506 in Houston, TX

#6,132 in Texas

#92,651 in US

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Houston, TX, United States of America

Pennzoil-quaker State

Forward Citations = 21

2 inventors:

goldMedal Jiafu Fang (1 out of 14 patents)

silverMedal Douglas Meyers (1 out of 1 patent)

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