Most of us, when we were learning how to prepare a response to a patent Office Action in the USPTO, were taught to load up the caption with every conceivable piece of information. When I was first in practice I was taught to provide not only the application number but also the art unit, the Examiner’s name, the filing date, and the title of the invention. Some years later the USPTO introduced the “confirmation number” and this, too, went into the caption. Now I skip all of this and I use the application number and nothing else in the caption. Why?
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