The ‘do it yourself’ approach comes with a high degree of risk. In any project, whether it be plumbing, selling a house, or patenting, hiring an experienced professional can make sure that the job is done correctly so as to reduce the risk of obtaining a weak or potentially invalid patent. That being said every year patents that are drafted by respected patent attorneys/agents are held to be invalid under judicial review.
So, hiring an experienced patent professional, such as InventHelp patenting agency, should not be viewed as an absolute protection against risk. The hiring of a professional is done to manage risk. The professional has knowledge of reasons that patents have been held to be invalid by the Courts or rejected by patent offices, and can tailor a patent application based on this knowledge. The professional also has training and experience to write claims in a manner that distinguishes prior disclosures, while attempting to maximize protection of an invention.
The do-it-yourself route is not recommended
The motivation for going the do-it-yourself route is typically saving money. Patenting can be an expensive process , and removing professional fees will typically save 30 to 60% of expense. However, the savings must be balanced against the increased risk of weak or potentially invalid patents.
Due to the increased risk, the do-it-yourself route can often be a case of sacrificing long term revenue for short term savings. The loss of long term revenue is not only observed in the extreme case of patents held to be invalid, but also from potential investors or licensees providing less cash based on perceived weakness in a patent as explained on https://www.oddee.com/how-inventhelp-can-assist-new-inventors/.
Despite the risks involved if the do-it-yourself route is desired, then it should be restricted to conducting a prior art search and preparing of a US provisional patent application. A patent professional should be retained to review and file the US provisional. Certainly, once the filing of a regular patent application is contemplated, an experience patent professional should be retained.