Unexamined patent application

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‘Some developing countries may not have such personnel or may not have them available for the Patent Office. Furthermore, the preliminary examination is time-consuming. Some of the applications will in any event be abandoned after a number of months or years because the prospects for the commercial exploitation of the inventions to which they relate have turned out to be less interesting than the applicant had hoped; thus, the examination of those applications will not achieve its purpose. In countries where there are a large number of filings. there may be an accumulation of unexamined applications, which means a delay in the whole procedure. Finally, the preliminary examination is very expensive, due to the cost of the necessary documentation and personnel.’ (WIPO MODEL LAW FOR DEVELOPING COUNTRIES ON INVENTIONS, Volume 1: Patents)