Growing community of inventors

Calgary, Canada

Doug J McCallum

Average Co-Inventor Count = 4.00

ph-index = 2

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 47

Doug J McCallumJohn H Duerksen (2 patents)Doug J McCallumDonald J Anderson (2 patents)Doug J McCallumMark Petrick (2 patents)Doug J McCallumDoug J McCallum (2 patents)John H DuerksenJohn H Duerksen (11 patents)Donald J AndersonDonald J Anderson (11 patents)Mark PetrickMark Petrick (2 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Chevron Research Company (1 from 1,860 patents)

2. Chevron Research & Technology Company (1 from 251 patents)


2 patents:

1. 5131471 - Single well injection and production system

2. 5024275 - Method of recovering hydrocarbons using single well injection/production

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as of
12/19/2025
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