| Table 5-25 |
| Patent citations to S&E articles, by selected patent technology area and article field: 1998–2010 |
| |
| Technology/field |
Citations (n) |
Percent |
| |
| Alternative energy |
7,852 |
100.0 |
| Chemistry |
2,770 |
35.3 |
| Physics |
2,171 |
27.6 |
| Engineering |
1,532 |
19.5 |
| Biological sciences |
1,179 |
15.0 |
| Geosciences |
116 |
1.5 |
| All others |
84 |
1.1 |
| |
|
|
| Energy storage |
3,909 |
100.0 |
| Chemistry |
2,106 |
53.9 |
| Engineering |
783 |
20.0 |
| Physics |
637 |
16.3 |
| Biological sciences |
338 |
8.6 |
| All others |
45 |
1.2 |
| |
|
|
| Smart grid |
1,433 |
100.0 |
| Physics |
750 |
52.3 |
| Engineering |
572 |
39.9 |
| Computer sciences |
33 |
2.3 |
| Biological sciences |
31 |
2.2 |
| Geosciences |
20 |
1.4 |
| Chemistry |
19 |
1.3 |
| All others |
8 |
0.6 |
| |
|
|
| Pollution mitigation |
5,390 |
100.0 |
| Chemistry |
1,643 |
30.5 |
| Biological sciences |
1,162 |
21.6 |
| Geosciences |
1,088 |
20.2 |
| Engineering |
1,068 |
19.8 |
| Physics |
211 |
3.9 |
| Agricultural sciences |
136 |
2.5 |
| All others |
82 |
1.5 |
| |
NOTES: Citations are references to S&E articles in journals covered by Science Citation Index (SCI) and Social Sciences Citation Index (SSCI). Citation counts based on a 6-year window with 5-year lag, e.g., citations for 2002 are references in U.S. patents issued in 2002 to articles published in 1992–97. Patents may appear in more than one technology area and 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™, special tabulations (2011) 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 2012 |
|