Robert B. Callen — 1 Patent at ExxonMobil

Robert B. Callen has been granted 1 US patent while listed as an inventor at ExxonMobil. All of these patents were granted in 1992. Robert B. Callen ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Robert B. Callen in McLean, VA, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
5098668	HF alkylation unit with acid evacuation system	Saverio G. Greco, Ronald D. McGihon, Zay K. Risinger, Paul W. Snyder	1992-03-24	$20,271,000

Robert B. Callen — 1 Patent

Issued Patents All Time

Patent Widget