% Expired Patents = 100.0

Forward Citations = 9

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5 inventors (with patents filed for the assignee):

John L Donovan (2 out of 10 patents)

Jay M Quimby (1 out of 2 patents)

Richard A Johnson (1 out of 1 patent)

4. Alan T Edwards (1 out of 2 patents)

5. McRea B Willmert (1 out of 2 patents)

2 patents: Sort by Forward Citations

1. 7700047 - System and method for treatment of hazardous materials, e.g., unexploded chemical warfare ordinance (2010-04-20),

2. 6705242 - Method and apparatus for hermetically sealing openings of an explosion containment chamber (2004-03-16),

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

2 Patents

#180 in Englewood, CO

#2,355 in Colorado

#94,782 in US

Englewood, CO, United States of America

Ch2m Hill Constructors, Inc.

Forward Citations = 9

5 inventors:

John L Donovan (2 out of 10 patents)

Jay M Quimby (1 out of 2 patents)

Richard A Johnson (1 out of 1 patent)

4. Alan T Edwards (1 out of 2 patents)

5. McRea B Willmert (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ch2m Hill Constructors, Inc.. Retrieved from https://idiyas.com/company/ch2m-hill-constructors

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]