Influence of Polyphosphoric Acid on the Consistency and Composition of Formulated Bitumen: Standard Characterization and NMR Insights
Table 6
Summary of issued patents related to bitumen modification with PPA.
Year
Type
Patent number
Licensing Company
1973
Chemically modified bitumen
US3751278 A
Tosco Lion Inc.
2009
US20090249978A1
Innophos
1991
Polymer-modified bitumen
US5070123 A
Exxon Research & Engineering
1996
US5565510 A
Montell North America Inc.
1996
US5519073 A
Shell Oil Company
1999
US5880185 A
Elf Exploration Production
2000
US6117926 A
Mathy Construction Company
2000
US6031029 A
Ergon
2000
US6136898 A
Marathon Ashland Petroleum
2002
US6414056 A
Exxon Mobil
2007
US20050284333
ICL Performance Products
2008
US7985787
Innophos
2010
Reclaimed asphalt pavement
US8906152
Innophos
2006
Roofing membranes
US7678467 B2
ICL Performance Products
2013
WO2013116637 A1
ICL Performance Products
2004
Crumb rubber modified bitumen
WO2004081098 A1
Eurovia
2011
WO 2011047032 A2
Innophos
2011
WO 2011057085 A2
Innophos
Search criteria. Keywords: (asphalt or bitumen) and (polyphosphoric acid) in title and abstract in Google Patents and Web of Knowledge databases. Accessed in December 2015.
