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Chemical Engineering: Patents

Patents

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Espacenet
(more info)
Publication coverage: 1836 - present
Canadian Patents Database (CIPO) Canadian resource
Canadian patent records, 1869 to present; full-text documents, 1920 to present.
U.S. Patent Databases (USPTO)
U.S. patents, 1790 to present and published applications, 2001 to present. Patents prior to 1976 can be retrieved by number, date and classification. TIFF viewer required to view/print patent documents.
PatentScope (WIPO)
International patent applications, 1978 to present.
Patent Lens
AU, EP, US and WO patent documents, 1970s to present.
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Last Updated: 01 March 2010