RE: [PIUG List] search problem, CASRN

Dear Eric - I very much appreciate your response.  I was rxtrtroubled to discover just how widespread this problem appears to be and was very much concerned about losing prior art retrievability.   Since some of the cpds listed in Chemcats have never been made giving them a CASRN might not be within the parameters associated with that file , but since they have been publised in a catalog, cited as prior art - perhaps CA could create a file of withdrawn CPDS having someother means of being identified .

Sandy

-----Original Message-----
From: "Shively, Eric"
Sent: Jan 16, 2008 9:57 AM
To: "PIUG Discussion List @ Listbox"
Subject: RE: [PIUG List] search problem, CASRN

Regarding  the question raised by Sandy Burcham, the information on commercially available substances in CHEMCATS is provided by the vendors of those substances. They may withdraw a chemical from commercial availability at any time, at which point the record would be taken off of  CHEMCATS. However, after a CHEMCATS listing is withdrawn, the substance record still appears in the CAS Registry, along with the vendor's name as the source of that substance's registration. So users can contact the vendor for more information as needed. 

The concern addressed in this recent discussion highlights the value of identifying substances of interest by CAS Registry Number, because those records will continue to be available in the CAS Registry, which is the authoritative source.  However, we recognize there is a problem if someone chooses to cite the CHEMCATS record or the supplier's chemical ID number as prior art.  We will consider means of helping users deal with that problem.

Eric Shively

CAS

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From: Sandy Burcham [mailto:cass123@earthlink.net]
Sent: Wednesday, January 16, 2008 8:57 AM
To: PIUG Discussion List @ Listbox
Cc: piug_discussion_list@v2.listbox.com
Subject: Re: [PIUG List] search problem, CASRN

Wendy Warr provided me wirh Ambinter's website and e-mail information.  Ambinter responded to  my request saying that the weird numbers were not their numbers either.  So far no one has been able to identify the number format.  I am extremely upset about what is disappearing prior art.  The people at CAS who are involved with Chemcats couldn't identify the format either but didn't seem bothered by the fact that the information hd come from their database originally and was no longer there-

Can we, as searchers, allow this prior art to disappear???

Sandy Burcham

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