John Burwell has been granted 15 US patents while listed as an inventor at Xerxes . The first was granted in 1990 and the most recent in January 2012. John Burwell ranks #307,048 of 4,157,543 US inventors in our database (top 7.4%). Patent records list John Burwell in Eagan, MN, US.
Patents per Year Patents granted per year, 1990 to 2012 Bar chart with a peak of 2 patents in 2002. peak 2 1990: 1 patents 1990 1993: 1 patents 1998: 1 patents 1998 2001: 1 patents 2002: 2 patents 2002 2003: 2 patents 2004: 1 patents 2004 2005: 1 patents 2006: 2 patents 2006 2007: 1 patents 2008: 1 patents 2008 2012: 1 patents 2012
Issued Patents All Time
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Showing 1–15 of 15 patents
Patent # Title Co-Inventors Date
8091728 Wet well apparatus with base form and installation method regarding same — 2012-01-10
7337590 Tank retaining system Douglas Morrissette , Robin Berg , David Grams 2008-03-04
7229233 Double walled containment sumps Michael Zais , Roberto Sanchez 2007-06-12
7150582 Form for street box in underground storage tank installation — 2006-12-19
7028967 Tank retaining system Douglas Morrissette , Robin Berg , David Grams 2006-04-18
6889865 Method and apparatus for pressure testing storage tanks Don C. Abel , Chester Batzkiel , Greg Carty , Onesimo Gomez , David Lehman +2 more 2005-05-10
6698610 Triple walled underground storage tank Robin Berg , Albert F. Dorris , John Smith 2004-03-02
6551024 System and method for detecting leaks in underground storage tank Robin Berg , Richard J. Kelber 2003-04-22
6517719 Oil and water separator — 2003-02-11
6467344 Underground storage tank buoyancy and buoyancy safety factor calculation method and apparatus Kiet Tuong Ly , Albert F. Dorris , Robin Berg 2002-10-22
6398057 Triple walled underground storage tank Robin Berg , Albert F. Dorris , John Smith 2002-06-04
6167608 Tank upgrading method and tank assembly Robin Berg , John M. Clark 2001-01-02
5720404 Female-molded underground storage tank and method of making Robin Berg , Neil Olson , John Smith 1998-02-24
5220823 Double walled underground storage tank Robin Berg , Dave Correll 1993-06-22
4948007 Underground storage tank of corrosion-resistant materials with internal steel rib Robin Berg 1990-08-14