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 Summary Sheet


Producer: IFI CLAIMS® Patent Services, a division of Fairview Research LLC, USA
File Size:More than 5.4 million records (08/2019)
File Type: Bibliographic
Content:U.S. patents

The IFI Current Patent Legal Status database provides information on the current legal status of U.S. patents. The database includes reassigned patents when ownership of the patent has been transferred from 1980 to present; reexamined patents that have undergone a review due to patentability questions from 1981 to the present; expired patents from September 1985 to the present; patents extended beyond the normal 17-year patent life from 1985 to the present, reinstated patents from 1985 to the present; patents with adverse decision in interference from 1980 to the present; and disclaimer/dedication information from 1980 to the present; and reexamination requests from 1980 to the present, requests for reissue from 1985 to present and certificate of correction notices. The source is the U.S. Patent and Trademark Office. Patent information, former and new assignments, reexamination data, and dates of actions are all searchable.


IFI CLAIMS(R) Patent Services,
a division of Fairview Research LLC
P.O. Box 1148
Madison, CT 06443 USA
Phone: (+1) 203 779-5301
Fax: (+1) 203 583-4521
Email: info(at)ificlaims(dot)com

Usage Terms

The following use and distribution restrictions apply to your use of the IFICLS File on STN. All copyrights are reserved.

Unless specified otherwise in these RESTRICTIONS, CUSTOMER may use copyrighted search results in the following ways:

  1. in copyrighted scientific publications when search results are incidental to the publication and
  2. in reports to a Government Agency that are required by law or by administrative rule. Search results delivered to CUSTOMER in computer-readable form remain the property of the Database Producer.

Unless specified otherwise in these RESTRICTIONS, Recipient may use search results in computer-readable form for the following purposes:

  1. editing or changing the format of search results to create search terms for use with search files or systems;
  2. combining search results with output from other searches, files, or systems to create a consolidated file of search results;
  3. editing the search results to remove irrelevant answers or to change the format of such results.

Recipient shall not use computer-readable search results as a database or part of a database from which hits are selectively retrieved by programmed search, unless Recipient has purchased the right to store search results using the ARCHIVE command or keyword.
Recipient may create one printed copy of search results from a computer-readable file of search results at no additional charge.
Recipient must destroy the computer-readable search results upon creation of the printed version, unless Recipient has purchased the right to archive records with the ARCHIVE command or keyword.
Recipient may purchase the right to redistribute search results to additional users using the REDISTRIBUTE command or keyword.

Enter HELP SHARETERMS for detailed information on the STN Information Keep & Share Program, which allows Recipients to purchase the right to archive and / or redistribute search results from STN databases for internal re-use. Or, visit the STN Information Keep & Share Program.

Recipient shall obtain Database Producer's specific written permission for any uses of computer-readable search results other than those listed here.