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Robert D. Cotherman — 2 Patents

SPShell Western E & P: 2 patents #1 of 35Top 3%

Houston, TX: #8,734 of 21,073 inventorsTop 45%

Texas: #52,941 of 125,132 inventorsTop 45%

Overall (All Time): #1,709,992 of 4,157,543Top 45%

2 Patents All Time

Robert D. Cotherman has been granted 2 US patents while listed as an inventor at Shell Western E & P. All of these patents were granted in 1990. Robert D. Cotherman ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Robert D. Cotherman in Houston, TX, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4913630	Method and apparatus for high-efficiency gas separation upstream of a submersible pump	Keith F. Way	1990-04-03
4901413	Method and apparatus for establishing multi-stage gas separation upstream of a submersible pump	Keith F. Way	1990-02-20

Robert D. Cotherman — 2 Patents

Issued Patents All Time

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