Charles P. Darnell has been granted 8 US patents while listed as an inventor at ExxonMobil . The first was granted in 1990 and the most recent in July 1997. Charles P. Darnell ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list Charles P. Darnell in Baton Rouge, LA, US.
Patents per Year Patents granted per year, 1990 to 1997 Bar chart with a peak of 3 patents in 1993. peak 3 1990: 1 patents 1990 1992: 1 patents 1992 1993: 3 patents 1993 1995: 1 patents 1995 1997: 2 patents 1997
Issued Patents All Time
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Showing 1–8 of 8 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
5643442 Membrane process for enhanced distillate or hydrotreated distillate aromatics reduction James Sweet Sweet , Tan-Jen Chen 1997-07-01
$118,102,000
5635055 Membrane process for increasing conversion of catalytic cracking or thermal cracking units (LAW011) James R. Sweet , Tan-Jen Chen 1997-06-03
$107,289,000
5416259 Feed pretreatment for pervaporation process Tan-Jen Chen , Enrique F. Juarez 1995-05-16
$77,212,000
5238563 Multi-element housing Dean L. Smith , Tan-Jen Chen , Richard J. Basile , Burghard H. Ruterbories , David H. Hopkins 1993-08-24
$39,772,000
5234591 Counter-current flow hollow fiber permeator Francis X. Mayer 1993-08-10
$103,796,000
5230801 Recovery of alcohols from n-paraffins by pervaporation Russell John Koveal , Tan-Jen Chen , W. S. Winston Ho 1993-07-27
$106,393,000
5169530 Hollow fiber module using fluid flow control baffles Robert C. Schucker , Mahmoud M. Hafez 1992-12-08
$90,117,000
4962270 Multi-stage pervaporation process run at progressively higher vacuum, higher temperature or both at each successive retentate stage Joseph L. Feimer , Robert C. Schucker 1990-10-09
$35,978,000
