When does experimental use of an invention end?
Experimental use of an invention ends when the invention is actually reduced to practice. According to the MPEP, Experimental use “means perfecting or completing an invention to the point of determining that it will work for its intended purpose.” Therefore, experimental use “ends with an actual reduction to practice.” (MPEP 2133.03(e)(3)) This means that once…
Read MoreHow does awaiting third-party approval affect the completeness of an invention?
Awaiting approval from a third-party organization, such as Underwriters’ Laboratories, typically does not extend the experimental use period if the inventor already considers the invention complete. The MPEP states: If the examiner concludes from the evidence of record that the inventor was satisfied that an invention was in fact “complete,” awaiting approval by the inventor…
Read MoreWhat constitutes evidence of experimental activity for patent purposes?
Evidence of experimental activity for patent purposes typically involves modifications or refinements to the invention. The MPEP provides guidance on this matter: The fact that alleged experimental activity does not lead to specific modifications or refinements of an invention is evidence, although not conclusive evidence, that such activity is not within the realm permitted by…
Read MoreHow does disposal of prototypes affect patent rights?
The disposal of prototypes before the critical date (typically one year before the patent application filing date) can affect patent rights. The MPEP provides guidance on how examiners should evaluate such situations: Where a prototype of an invention has been disposed of by an inventor before the critical date, inquiry by the examiner should focus…
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