| 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 |
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