been ignored in several cases, for example an offer for sale of a waste disposal machine which, if accepted would have practiced a later invention due to the special nature of the waste, was considered a barring sale even though the invention had not even been conceived yet and the sale did not take place. There is no joint-development exception to the on-sale bar, meaning that the on-sale bar in many cases is triggered when the invention is "ready for patenting," which can occur when an inventor is working alone at a drafting table. The ready-for-patenting standard is judged retrospectively in an adversarial setting, so even if an invention was far too premature to have been put into a patent application, with details missing, it may still be deemed to have been "ready for patenting." Moreover, an inadequate disclosure cannot provide priority for a continuation-in-part application, so an inventor who fears the on-sale bar and files a premature patent application may not be able to rescue it later. See also Novelty (patent) Post-sale restraint References External links 35 U.S.C. 102 Conditions for patentability; novelty and loss of right to patent. MPEP 2133.03(b) "On Sale" [R-2 - 2100 Patentability United States patent law