USPTO Devises New Rules To Limit Complex Claims

Law360, New York (August 13, 2007, 12:00 AM EDT) -- The U.S. Patent and Trademark Office has proposed new rules that could aide the process of evaluating claims that contain more than one “independent and distinct” invention.

The rule change focuses on language used in patent applications to detail alternative versions of a single invention. This language was originally used in chemical fields but now is frequently used in claims from many areas of technology.

The phrasing typically used for this type of claim is called Markush language, named after Eugene Markush, the first inventor to...
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