The description of the U.S. Patent Classification corresponds to the Manual of Classification and the Index to the U.S. Patent Classification issued by the U.S. Patent and Trademark Office. This is the largest collection of U.S. patent references available in an online database. Contains all granted U.S. chemical patents from 1950 forward. Design and plant patents are available from December 1976 forward.
Earlier records contain basic bibliographic data and the exemplary claims only.
Titles are available in all three languages. English abstracts are added to German and French documents within several weeks of their addition to the database. 1966- Updated Weekly Covers all French patent applications and granted French patents published by the INPI . Records include bibliographic, administrative and legal status data for each patent. Abstracts and descriptors are also available since 1978.