Growing community of inventors

Calgary, Canada

John Alexander MacDonald

Average Co-Inventor Count = 3.00

ph-index = 1

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 = 3

John Alexander MacDonaldPaul R Larson (2 patents)John Alexander MacDonaldLeslie L Lang (1 patent)John Alexander MacDonaldLeslie Lloyd Leroy Lang (1 patent)John Alexander MacDonaldJohn Alexander MacDonald (2 patents)Paul R LarsonPaul R Larson (3 patents)Leslie L LangLeslie L Lang (6 patents)Leslie Lloyd Leroy LangLeslie Lloyd Leroy Lang (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Brimrock International Inc. (2 from 6 patents)


2 patents:

1. 8425783 - System and method that removes contaminants from sulfur

2. 7918994 - System that removes contaminants from sulfur

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as of
12/29/2025
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