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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 (* $ ?).

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Search Rules

• 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 tetracycline.

• *Oxide matches peroxide, sulfoxide, nitric oxide, zinc oxide, and more.

• Vitamin D matches vitamin D.

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Search Examples

• "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.

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Search Tips

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.