Date: Mon, 15 Sep 2008 12:47:42 +0100
Dear List Members,
I am a scientist but not a patent specialist and would like to know the meaning of compositional range in a patent claim. An example would be a metal alloy containing 0.5-3.0% of bismuth.
There is an international standard providing protocols on the rounding of numbers, which, as a scientist, I would expect to be valid. However, I have found out that, in the field of products sold to the public, minimum 0.5litres means at least 0.5 followed by an infinite number of noughts. Can you please tell me which convention applied to patents?
Returning to the example above, would an alloy containing 0.455% bismuth fall within the range 0.5-3.0% bismuth?
Best regards,
Roger Bilham
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Received on Mon Sep 15 2008 - 14:22:30