How does the purification of an old product impact its patentability?
The purification of an old product can impact its patentability, but mere purity alone is not always sufficient to render a product nonobvious. According to MPEP 2144.04, “Pure materials are novel vis-à-vis less pure or impure materials because there is a difference between pure and impure materials. Therefore, the issue is whether claims to a…
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