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U.S. PATENT AND TRADEMARK OFFICE
Office of Electronic Information Products
Patent Technology Monitoring Division (PTMD)

Patenting In Technology Classes,
Breakout By Organization

Count of 1998 - 2002 Utility Patent Grants,
By Calendar Year of Grant
With Patent Counts Based on Primary Patent Classification

- Explanation of Data -

Rank Ordered Listing of Organizations Receiving 5 or More Utility Patents During the Period
Having Primary Classification In

Class 518, Chemistry: Fischer-Tropsch Processes; or Purification or Recovery of Products Thereof

( technology class is determined by the primary classification assigned to the patent- see 'Explanation of Data' )
( patent ownership is determined by the first-named assignee listed on a patent )

The following table displays first-named assignees and counts of their associated patents, as distributed by the year of patent grant
First-Named Assignee 1998 1999 2000 2001 2002 Total
EXXON RESEARCH + ENGINEERING CO. 8 11 11 3 1 34
INSTITUT FRANCAIS DU PETROLE 5 1 1 3 3 13
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY 0 0 0 4 7 11
SYNTROLEUM CORPORATION 0 0 1 8 1 10
~Individually Owned Patent 1 0 1 4 1 7
AGIP PETROLI, S.P.A. 1 1 4 0 0 6
AIR PRODUCTS AND CHEMICALS, INC. 1 0 4 0 1 6
CHEVRON U.S.A. INC. 0 0 0 2 3 5
IMPERIAL CHEMICAL INDUSTRIES PLC 0 1 0 1 3 5
MITSUBISHI HEAVY INDUSTRIES CO., LTD. 0 1 0 2 2 5
SHELL OIL COMPANY 1 3 0 0 1 5


PTMD Contacts

Questions regarding these reports should be directed to:

U.S. Patent and Trademark Office
Office of Electronic Information Products - PTMD
PK3- Suite 441; P.O Box 1450
Alexandria VA 22313

tel: (703) 306-2600
fax: (703) 306-2737
email: oeip@uspto.gov

address of PTMD pages at the USPTO Web Site: http://www.uspto.gov/web/offices/ac/ido/oeip/taf/tafp.html
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