Table 5-27
Patent citations to S&E articles, by selected patent technology area and article field: 2003–12
 
Technology/field Citations (n) Percent
 
Alternative energy 24,800 100.0
Chemistry 7,611 30.7
Physics 6,004 24.2
Engineering 5,285 21.3
Biological sciences 5,017 20.2
Geosciences 400 1.6
Agricultural sciences 365 1.5
All others 118 0.5
 
Energy storage 7,278 100.0
Chemistry 3,771 51.8
Engineering 1,555 21.4
Physics 1,164 16.0
Biological sciences 685 9.4
All others 103 1.4
 
Smart grid 1,695 100.0
Engineering 900 53.1
Physics 595 35.1
Computer sciences 85 5.0
Biological sciences 37 2.2
Geosciences 31 1.8
All others 47 2.8
 
Pollution mitigation 8,578 100.0
Chemistry 2,943 34.3
Engineering 1,817 21.2
Geosciences 1,605 18.7
Biological sciences 1,500 17.5
Physics 326 3.8
Agricultural sciences 243 2.8
All others 144 1.7
 

NOTES: Citations are references to S&E articles in journals covered by the Science Citation Index (SCI) and Social Sciences Citation Index (SSCI). Citation counts are based on an 11-year window with a 5-year lag (e.g., citations for 2012 are references in U.S. patents issued in 2012 to articles published in 1997–2007). Patents may appear in more than one technology area; thus, citation counts may overlap slightly. See sidebar “Identifying Clean Energy and Pollution Control Patents” for details on these technology areas.

SOURCES: National Science Foundation, National Center for Science and Engineering Statistics, and The Patent Board,TM special tabulations (2013) from U.S. Patent and Trademark Office (USPTO), Patent Grant Bibliographic Data, and Thomson Reuters, SCI and SSCI, http://www.thomsonreuters.com/products_services/science/.

Science and Engineering Indicators 2014