Searching the Topic Field
Enter topic terms to search the Title and Abstract fields within a patent
record. All search terms are searched against Derwent title terms.
Enter your search terms in any order. The product returns every record
containing all your search terms. To look for an exact phrase, use quotation
marks. Example: "global warming"
Enter terms connected with search
operators (AND, OR, NOT). Enter complete words and phrases or partial words
and phrases using wildcards (* $ ?).
AIDS, Aids, and aids
returns the same results: case does not matter.
Enzym* matches enzyme, enzymes, enzymatic, and enzymology.
Sul*ur matches sulfur and sulphur.
*Cycline* matches doxycycline, monocycline, and
*Oxide matches peroxide, sulfoxide, nitric oxide, zinc
oxide, and more.
Vitamin D matches vitamin D.
"Water consumption" finds records containing the exact
phrase water consumption.
Water AND consumption finds records containing the words
water and consumption. The two words may appear in the same Topic field or they
may be in different Topic fields.
Water consumption (without quotation marks) is equivalent to
the search water AND consumption.
Water AND consum* finds records containing the words water,
consume, consumed, consumer, consumption, and so on.
*Water AND consumption finds records containing the words
water, freshwater, saltwater, seawater, and consumption.
Water OR consumption finds records containing either water
or consumption or both words.
Use quotation marks to find exact phrases. For example, "soil
drainage" finds soil drainage, but not drainage of soil.
Use terms without quotation marks to find records that contain those terms.
For example, soil drainage finds soil drainage, drainage of
soil, soil type and drainage, and so on.