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"About" is found in many claims, including range claims like the one you point out. There is a very rich case law and commentary about "about". The first issue would be the meaning of about in the context of the patent. If an alleged infringer was outside whatever that was determined to be then the doctrine of equivalents could come into ...


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Many practitioners draft claims before drafting the specification. When you think about claiming you think broadly. If you start the specification first you are likely to start, and possibly end, with describing a specific embodiment. After the thought that goes into preliminary drafting of claims one is in a better position to generate a wider range of ...


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