There are several patents on tin-silver-copper alloys.  These (in
certain formulations) are patented in Japan (i.e., by Senju) and
elsewhere (i.e., Ames Lab in the U.S.).  To promote a patented alloy a
company must have an agreement with the patent holder.

Regards,

David Suraski
AIM
+1-401-463-5605 ext. 5210
www.aimsolder.com 

-----Original Message-----
From: Nimal Liyanage [mailto:[log in to unmask]] 
Sent: Thursday, September 09, 2004 11:47 PM
To: [log in to unmask]
Subject: [TN] Lead Free Alloy patents

At the first lead free solder conference in MN we all learned that there
are many patents issued to the tin/silver/copper and other lead free
alloys.

Can any vendor manufacture the Japanese adopted alloy
96.5Sn/3.0Ag/0.5Cu and the  NEMI alloy 95.5/3.9/0.6Cu for commercial
purposes? As an independent entity, NEMI has conducted extensive studies
on tin/Ag/Cu and I was under the impression that any commercial company
could freely market both of these alloys. Apparently, the SAC alloy
promoted in Japan does not have any patent either.

Any comments?


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