|
Data
A list of NSE keywords (Table 1) provided by domain experts were used to search for related patents/grants from the NSF grants database as well as from the three repositories: USPTO, EPO and JPO.
- For USPTO patents, nanotechnology patents were retrieved by searching the nanotechnology-related keyword list in patent title, and abstract, (“title-abstract” search), in patent title, abstract, and claims (“title-claims” search) and in all patent data fields (“full-text” search) .
- For EPO patents, nanotechnology patents were retrieved using only “title-abstract” search in esp@cenet, because of the limitation of the search function of esp@cenet.
- For JPO patents, althrough JPO has an official patent database, Patent Abstracts of Japan (PAJ), PAJ is difficult to spider. Thus nanotechnology patents/applications were retrieved using “title-abstract” search in esp@cenet. The patent status information was retrieved from PAJ to filter the application out of the dataset.
- For NSF grants, nanotechnology grants were retrieved by searching the nanotechnology-related keyword list in grant title, program, and abstract in NSF.
The table listed below shows the list of NSE keywords used and the number of patents containing the keyword in each of the four databases.
Table 1. NSE Keywords and search results from USPTO, EPO, JPO and NSF
| |
USPTO(1976-2006) |
EPO(1978-2006) |
JPO(1976-2006) |
NSF(1991-2006) |
| |
Full-text search |
Title-claims search |
Title-abstract search |
Title-abstract search |
Title-abstract search |
Title-abstract search |
| atomic force microscope |
3,020 |
465 |
277 |
71 |
67 |
241 |
| atomic force microscopic |
91 |
6 |
2 |
2 |
1 |
16 |
| atomic force microscopy |
2,347 |
143 |
91 |
23 |
8 |
430 |
| atomic-force-microscope |
6 |
0 |
0 |
0 |
0 |
40 |
| atomic-force-microscopy |
5 |
0 |
0 |
0 |
0 |
67 |
| atomistic simulation |
10 |
0 |
0 |
0 |
0 |
107 |
| biomotor |
8 |
1 |
0 |
1 |
0 |
0 |
| molecular device |
230 |
22 |
9 |
5 |
3 |
371 |
| molecular electronics |
422 |
5 |
5 |
4 |
3 |
384 |
| molecular modeling |
2,365 |
51 |
34 |
3 |
1 |
1255 |
| molecular motor |
99 |
3 |
2 |
4 |
0 |
135 |
| molecular sensor |
48 |
9 |
0 |
2 |
1 |
185 |
| molecular simulation |
73 |
2 |
2 |
1 |
1 |
449 |
| nano* |
90,093 |
15,973 |
6,352 |
3,248 |
847 |
8,121 |
| quantum computing |
144 |
41 |
28 |
4 |
1 |
471 |
| quantum dot* |
988 |
267 |
160 |
64 |
90 |
524 |
| quantum effect* |
699 |
65 |
40 |
18 |
67 |
435 |
| scanning tunneling microscope |
1,284 |
218 |
148 |
47 |
80 |
190 |
| scanning tunneling microscopic |
25 |
1 |
0 |
0 |
1 |
8 |
| scanning tunneling microscopy |
996 |
52 |
28 |
8 |
0 |
326 |
| scanning-tunneling-microscope |
24 |
0 |
0 |
0 |
0 |
11 |
| scanning-tunneling-microscopy |
1 |
1 |
0 |
0 |
0 |
24 |
| selfassembl* |
31 |
4 |
3 |
1 |
0 |
13 |
| self assembly |
2,692 |
268 |
161 |
46 |
7 |
316 |
| self assembled |
2,672 |
460 |
251 |
38 |
1 |
241 |
| self assembling |
1,237 |
208 |
131 |
57 |
5 |
187 |
| self-assembled |
2,506 |
426 |
233 |
0 |
0 |
570 |
| self-assembling |
1,127 |
189 |
120 |
0 |
0 |
286 |
| self-assembly |
2,478 |
239 |
142 |
0 |
5 |
772 |
| Total |
115,721 |
19,119 |
8,219 |
3,647 |
1189 |
16,175 |
| Unique Total |
97,509 |
17,544 |
7,406 |
3,596 |
1150 |
10,114 |
Data Limitations
Because JPO patents do not contain assignee country information, the publication trend assignee country could not be studied for JPO nanotechnology patents.
Because JPO patents
and NSF grants do not contain citation information, we were unable study the citation networks could not be studied.
|
