In the US you have one year after public disclosure in which to file an application. The rest of the world you have to file before release.
If one discloses his or her own work more than 1 year before the filing of the patent application, that person is barred from obtaining a patent. In re Katz, 687 F.2d 450, 454, 215 USPQ 14, 17 (CCPA 1982). The 1-year time bar is measured from the U.S. filing date. Thus, applicant will be barred from obtaining a patent if the public came into possession of the invention on a date before the 1-year grace period ending with the U.S. filing date. It does not matter how the public came into possession of the invention. Public possession could occur by a public use, public sale, a publication, a patent or any combination of these. In addition, the prior art need not be identical to the claimed invention but will bar patentability if it is an obvious variant thereof. In re Foster, 343 F.2d 980, 145 USPQ 166 (CCPA 1966). See MPEP § 706.02 regarding the effective U.S. filing date of an application.