What’s Public Disclosure?
US: 35 U.S.C. §102A person shall be entitled to a patent unless - the invention was . . . patented or described in a printed publication . . . .
Europe: An invention shall be considered to be new if it does not form part of the state of the art. The state of the art shall be held to compromise everything made available to the public . . . before the date of filing of the European patent application . . . .
Japan: Any person who has made an invention which can be utilized in industry may obtain a patent except for the following inventions:... An invention which has been described in a publication distributed in Japan or in any foreign country prior to a patent application.