Posts Tagged "dupont"

3D test tubes

How ranges described in prior art trigger obviousness presumption

Some patents specify ranges to account for variability — for example, a range of temperatures in which a process occurs. These types of patents can run into obviousness issues that can invalidate them if the range overlaps with ranges detailed in so-called “prior art.” Patentees in such cases aren’t totally out of luck, though, as they have the opportunity to rebut the presumption of obviousness.

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