* Uncool: USPTO Breaks Millions Of Patent URLs Without Public Notice

Static URLs? We don’t need no stinkin’ static URLs!

The United States Patent and Trademark Office (USPTO) handles both patents and trademarks, but the patent side of the house lags behind the trademark side of the house in implementing user-friendly technology. Over the weekend, the USPTO updated the URL format that it uses for it’s public PAIR system <http://portal.uspto.gov/external/portal/pair> (PAIR stands for Patent Application Information Retrieval).

PAIR is used by patent applicants, patent practitioners, and the public at large to check the status of pending and issued patent applications. The public PAIR portion is for applications that have been published or issued, the private PAIR system is for the rest (and requires a special encryption key to access, which is available to patent practitioners).

My patent and trademark law firm, Clock Tower Law Group <http://www.clocktowerlaw.com/>, routinely sends static URLs to clients so that they can monitor the progress of their own applications. We also monitor all of these URLs. One of the reasons that we proactively monitor URLs for our clients is because we believe that it is better to prevent problems before they get out of hand. For example, one of our client’s trademarks was accidentally assigned to Viacom due to a USPTO error. If we had not been monitoring our client’s trademarks, then this problem may not have been discovered.

Trademark URLs have a very simple format (based on the trademark application number).

For example, here is the URL for one of our client’s trademarks (the KAYAK.COM trademark):


And here is the URL for one of our own trademarks (the CLOCK TOWER LAW GROUP logo trademark):


The Trademark Office’s TARR URLS (TARR stands for Trademark Application and Registration Retrieval – the USPTO loves its acronyms) are very helpful. They include the current owner, current attorney, current status, and a brief prosecution history. Perfect, really. And they are constantly updated.

The Patent Office’s PAIR URLs, on the other hand, are ugly, long, and difficult to parse. But up until today, they were at least functional. Here is the URL for one of the patents we prosecuted (for Inceptor, now owned by Idearc):


Hint: the above URL does not work.

Note the “09456777” in that URL, which is the patent application number for this application, which issued as United States Patent 7062707 <http://www.giantpeople.com/648.html>.

The irony is that if you search for the application and bookmark one of its URLs (such as the file history tab), then you will get a URL of the above format. You can bookmark the URL for that tab, and another tab, and both will work, but only for the duration of your browser session. If you quit your browser and restart, then those URLs will not work. Until today, it did not work like this.

It gets worse. The PAIR system is setting a cookie on your system, which includes session data. The cookie expires at the end of the session, but the URL appears to depend on the session data in the cookie. I would argue that there is no reason to set the cookie in the first place. There is certainly no reason to have the a static URL depend upon it, and to have the URL expire at the end of your browser session, but that’s how it now works. This also appears to be contrary to the USPTO’s own privacy policy <http://www.uspto.gov/web/doc/privact.htm>, which discloses the use of cookies for other USPTO systems, but not for public PAIR.

Despite the general ugliness of the PAIR URLs, they used to work just fine. You could bookmark them, email them to your clients, or use a URL monitoring service <http://lifehacker.com/software/web-utilities/download-of-the-day-infoic-157706.php> to monitor their status.

It’s bad enough that neither the Patent Office nor the Trademark Office offer ATOM or RSS feeds for trademark status (TARR) and patent status (PAIR), but it’s unforgivable that the Patent Office broke millions of static URLs over the weekend without notice (or apparent reason).

If you are as upset about this as I am, then please send email to the USPTO Electronic Business Center at ebc@uspto.gov and urge them to restore static URLs, to simplify and standardize their formats, and not to change the URLs without adequate public notice and comment.

You could also urge the USPTO to add ATOM or RSS feeds, but one step at a time.

In the spirit of full disclosure, Kayak and Inceptor are/were clients of Clock Tower Law Group and are mentioned in this article.

26 Replies to “* Uncool: USPTO Breaks Millions Of Patent URLs Without Public Notice”

  1. Update 2007-01-02: PAIR is in the process of implementing a Captcha challenge to “…prevent disruptive use by automated programs.”

    HA! There are captcha mines in China, India and other countries that can be employed to circumvent that.

    The real issue is as I mentioned in my post dated March 29th, 2007: the inefficiency of the PAIR site itself, namely its 65-to-100 to one ratio of peripheral information to that which is desired.

  2. Word on the street is that the USPTO is considering privatizing the access to PAIR, probably selling it to Thomson & Thomson or some other money grubbing scum buckets. So the taxpayer will have to pay twice to prepare then retrieve public information. This bureaucracy is OUT OF CONTROL

  3. Hi all,

    I recently contacted EBC by phone to protest. They just said they were aware of the issue and that they didn’t expect any changes in the near future.

    So I came up with a php script that will fetch the desired information with wget from an application number. The principle is to first load the search form page, save the session cookie and retrieve the randomly generated “URL key” from that page. A session unique URL is then generated from the key and the application number, and wget is used on that URL, passing on the previously saved cookie.

    I haven’t fully tested this yet, but my first trials work. I assume this script can be adapted to create a redirection to the correct link (but I haven’t worked on that because I didn’t have that need).


  4. Message from:


    Internal Server Error

    The server encountered an internal error or misconfiguration and was unable to complete your request.

    Please contact the server administrator, usptoinfo@uspto.gov and inform them of the time the error occurred, and anything you might have done that may have caused the error.

    More information about this error may be available in the server error log.


    IBM_HTTP_Server/ Apache/2.0.47 (Unix) Server at portal.uspto.gov Port 80

  5. Greetings Kerry,

    I contacted the ABA yesterday but they were no help.

    The USPTO is now putting session data garbage in the URL as well. Check out this URL (same example as my original post):


    Nice. I somehow think that blogging is the only way this problem will be fixed.


  6. Thanks, Kerry, for the link to Patent Lens–very interesting treatment of IP.

    I noticed that Patent Lens provides an even simpler mechanism for linking to PAIR via redirection:



    Just substitute the numbers in these examples with your own. Note the presence of “US” before the publication number and its absence before the filing number. Interestingly, I was able to use both 10-digit and 11-digit publication numbers (e.g., US20070067865 and US2007067865).

  7. The CAMBIA Patent Lens http://www.patentlens.net is a free, independent, public good global resource for increasing patent transparency. The Patent Lens has over 6.4 million fully text searchable patent applications and grants from the USPTO, EPO and WIPO.

    We were in the final stages of testing links to PAIR on the Patent Lens, when like many others, we were derailed by the unexpected USPTO PAIR “upgrade”. We have come up with a work-around that uses a carefully constructed static URL to access PAIR. Click on the PAIR link on this Patent Lens results page http://www.patentlens.net/patentlens/patsearch.cgi?patnum=US+2007/67865+A1#show to see it in action. It will take you directly to the PAIR page for that application. The URL of the PAIR page is effectively a static link that can be cut, pasted, emailed, etc. However, it is important to note that although the PAIR link we generate can be treated like a static URL, any changes to PAIR by the USPTO (such as another “upgrade”) could render the new static links inoperative.

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