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CLAIMS® Classic Databases

Classic US Patent Database with Legal Status

The most extensive online, text-searchable collection of U.S. patents.

The CLAIMS U.S. Patents Database contains references to more than 3 million patents granted in the United States since 1950. Known for our broad coverage, in-depth indexing of chemical patents and extensive standardization of company names, the database represents the largest collection of clean and reliable, text-searchable U.S. patent references available in an online database.

The CLAIMS U.S. Patents Database includes:
  • All chemical patents since 1950
  • All utility patents since 1963
  • Complete collection from 1971-74, including 96,000 patents not found in USPTO online records or other files for that time period
  • All design patents since December 1976
  • All plant patents since December 1976
Each record in the database provides:
  • Patent title, patent number, issue date
  • Assignee names(s)
  • Inventor name(s)
  • Bibliographic data including the U.S. Patent Office Classifications and International Patent Classifications
  • Main claim from the USPTO Official Gazette (O.G.)
For patents issued since 1971, database records also include all data from the front page of the patent (application data, priority application data, addresses of inventors, etc.) plus abstract from the front page of the patent and all patent claims.

The CLAIMS US Patents Database is available from the following online vendors using these file names:
Dialog — 340
STN — IFIPAT
Questel — IFIPAT

Classic Comprehensive US Patent Database with Chemical Indexing

The premier source for U.S. chemical patent information. CLAIMS Chemical Indexing Databases (Uniterm Database and Comprehensive Database) include all of the information contained in the CLAIMS U.S. Patents Database as well as in-depth subject indexing for chemical and biological patents.

This indexing, which uses standardized terminology to describe chemical concepts, novelty, and utility of the invention, provides for more comprehensive retrieval of chemical and biological patents. Some key features of the CLAIMS Chemical Indexing Databases include:
  • Effective and versatile polymer search system
  • Coverage of all chemical and biological technologies back to 1950
  • Indexing based on the complete patent document, emphasizing what is novel and useful about the invention
  • In-depth fragmentation system used to describe Markush structures, generic chemical structures and specific structures not found inIFI's compound registry
  • Standardized linear notations for chemical structures which can be searched and displayed online
  • Indexing performed by experienced IFI chemists
  • Well-defined indexing guidelines and a comprehensive proprietary thesaurus which ensure consistency
  • Monthly updates.
The CLAIMS Comprehensive Database is available only to IFIsubscribers. The database contains all of the patent information that is in the CLAIMS U.S. Patent and CLAIMS Uniterm databases. In addition, this file contains special subject indexing with enhanced retrieval capabilities for chemical and chemically related patents. This indexing, which includes general terms, compound terms, and fragment terms, provides for much more comprehensive retrieval of chemical patents.

Some of the important features of the CLAIMS Comprehensive Database include:
  • Enhanced polymer retrieval system
  • Comprehensive substructure fragmentation system
  • Ability to search roles to define chemical functions
  • Usage time not restricted
Roles are two digit numbers used to tell whether a substance is present, a reactant, or a product in a particular patent, and are used extensively in the IFI polymer indexing system.

Chemical Structure Images

Chemicals in patents are often described as images, which cannot be retrieved in a text search. IFI indexers interpret and annotate patents with standard chemical terminology that can be easily searched by a chemist.

Markush structure for the drug tadalafil.
In this example, an IFI chemical indexer recognized and indexed the drug tadalafil from the following Markush structure claimed in a patent, even though that drug’s common name does not appear in the patent (US7550479):

Searching Polymer Chemistry

The IFI Polymer system breaks complex polymer structures into easily searched prescribed monomers, and special 2 digit role indicators further identify polymer class, and whether the monomer is part of a homo- or copolymer.

For example, when a patent describes a polysiloxane polymer using a representation like the one here, IFI identifies the component monomeric units, and indexes a standard silanediol compound for each type of repeating unit. The repeating units are tagged with appropriate role indicators, and IFI standard terms are indexed for Polysiloxanes and Copolymers.

With this information, a searcher can find this patent when searching for the exact copolymer described here, or whenever the search requires any one or more components included in this polymer, e.g., any polysiloxane copolymer containing diphenylsiloxane units.
Example: polysiloxane polymer

IFI indexed each unit in copolymer roles:
  • Diphenylsilanediol 77 (2 digit copolysiloxane role indicator)
  • Silanediol, methyl/3,3,3-trifluoropropyl/- 77
  • Dimethylsilanediol 77
IFI also indexed the class term: Polysiloxanes

The CLAIMS Comprehensive Database is available from the following online vendors using these file names:
Dialog — 942
STN — IFICDB
Questel — IFICDB