Neil,
To expand on Edlyn's comments a bit, IFI's CLAIMS Legal Status file
contains notices of all US patent expirations due to failure to pay
maintenance fees. We compile the information from the weekly OG notices,
and they are updated weekly, about a week after the OG publishes.
In the main CLAIMS files, we also calculate the date of expected normal
expiration, based on the date of first US filing and/or date of issue.
For patents whose normal term has not expired, you would then check for
premature expirations. The CLAIMS records will always show the
calculated normal expiration date (even if the date is past or the
patent has prematurely expired) and subsequent actions, such as EXPIRED,
are separately noted in the record.
Darlene Slaughter
IFI CLAIMS Patent Services
3202 Kirkwood Highway
Wilmington, DE 19808
800-331-4955
302-633-7210
302-998-0733 (fax)
mailto:darlene.slaughter@aspenpubl.com
<mailto:darlene.slaughter@aspenpubl.com>
-----Original Message-----
From: Neil_Walden@SANDWICH.PFIZER.COM
[mailto:Neil_Walden@SANDWICH.PFIZER.COM]
Sent: Friday, January 18, 2002 5:17 AM
To: PIUG-L@derwent.co.uk
Subject: FW: Expired Patent
Dear PIUG list colleagues,
I have received the attached message from the provider of a weekly
commercial newsletter dealing with patent expiries, and post it to the
list for information and comment. My original document is now out of
date and I would be interested to receive details of other sources of
patent expiry information, so that eventually the document can be
updated.
Neil Walden
Patent Information Consultant
Information Management (IPC 855)
Pfizer Global Research and Development
Sandwich, Kent, CT13 9NJ, UK
Tel: +44 1304 642351
Fax: +44 1304 658300
E-mail : Neil_Walden@sandwich.pfizer.com
LEGAL NOTICE
Unless expressly stated otherwise, this message is
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If you are not an addressee, please inform the sender
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Pfizer Limited is registered in England under No. 526209 with its
registered office at Ramsgate Road, Sandwich, Kent CT13 9NJ
-----Original Message-----
From: Gary Hanson [mailto:GRH230377@prodigy.net]
Sent: 17 January 2002 04:04
To: YUNH@war.wyeth.com
Cc: Walden, Neil
Subject: Expired Patent
PFIZER GLOBAL RESEARCH AND DEVELOPMENT
----------------------------------------------------------------
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PGRD Sandwich Data Centre.
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I saw a note you posted to Derwent.
The link you provided
<http://www.uspto.gov/web/offices/pac/expired/index.html>
http://www.uspto.gov/web/offices/pac/expired/index.html is no longer
useful, the USPTO has closed public release of information on expired
patents. They only provide phone numbers and email address for
inquiries.
You might try www.expatent.com <http://www.expatent.com> which is a
webpage link to a fee based newsletter. I am the author of that
newsletter and although this newsletter only provides a weekly list of
expired patents, I can look up information on individual patent numbers
from my database.
PFIZER GLOBAL RESEARCH AND DEVELOPMENT
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PGRD Sandwich Data Centre.
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