For the Inventor, By the Inventor

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Denver, CO, United States of America

Cf&i Engineers, Inc.

USPTO Granted Patents = 2

Forward Citations = 19

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4 inventors (with patents filed for the assignee):

Mathieu J Vertenstein (1 out of 6 patents)

Wilhelm J Leibig (1 out of 1 patent)

Clarence R Steele (1 out of 1 patent)

4. Frank B Price (1 out of 4 patents)

2 patents: Sort by Forward Citations

1. 4052304 - Preheating device for centrifugal (1977-10-04),

2. 4043832 - Apparatus for extracting substances from fibrous materials (1977-08-23),

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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#377 in Denver, CO

#2,277 in Colorado

#92,551 in US

Denver, CO, United States of America

Cf&i Engineers, Inc.

Forward Citations = 19

4 inventors:

Mathieu J Vertenstein (1 out of 6 patents)

Wilhelm J Leibig (1 out of 1 patent)

Clarence R Steele (1 out of 1 patent)

4. Frank B Price (1 out of 4 patents)

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