(2) The contents disclosed in the application of any unit or individual in the Patent Office are the same as all the topics of the application, or are the same as some topics. The former's application date is between the latter's application date and the claim priority date, while the former's publication or announcement date is after the latter's application date, that is, the application of any unit or individual in the patent office constitutes a PE document;
(3) The contents disclosed in the application of any unit or individual in the Patent Office are the same as all the themes of the application, or are the same as some of the themes. The priority date required by the former is between the application date and the required priority date, while the publication or announcement date of the former is after the application date of the latter, that is, any unit or individual's application in the patent office constitutes a PE document. Didn't say what P/X/Y/E meant. In fact, these abbreviations come from the abbreviations in the retrieval report of PCT application indicating the correlation of comparative documents: "A" document defines the general state of the prior art that is not considered as particle correlation.
Class A literature, defined as the general literature of the existing technical level, has no special relevance; "e" the earlier application or patent published on or after the international filing date.
Class E documents are prior documents, but the publication date is at the same time as or after the international filing date (whether it conflicts with the application needs to be verified); The "L" document may raise questions about the priority requirements, or be cited to determine the publication date of another citation or other special reasons (if specified).
L-class documents, documents that may have doubts about the priority claim, or documents cited for determining the publication date of other cited documents or other special reasons;
"O" document means oral disclosure, use, display or other means.
Class O documents refer to documents published orally, by use, by exhibition or by other means; "P" documents published before the international filing date but later than the required priority date.
Class P documents, the publication date of which is earlier than the international application date of the application documents but later than the priority date (the priority of the application documents needs to be verified); Documents after "T" published after the international filing date or priority date do not conflict with the application, but are cited to understand the principle or theory of the invention.
Class T documents published later than the international application date or priority date do not conflict with the application documents, but the citation is helpful to understand the invention principle; Particularly relevant "X" documents; When this document is considered separately, the claimed invention cannot be regarded as novel or as including inventive steps.
Class X documents, with special relevance, can deny the novelty or creativity of the invention application documents through single comparison; Particularly relevant "Y" documents; When this document is combined with one or more other such documents, the claimed invention cannot be considered to include inventive steps, and such combination is obvious to those skilled in the art.
Class Y documents, with special relevance, can be combined with other similar documents to deny the creative documents of the invention application, which is obvious to those skilled in the field; "& File members of the same patent family
& Literature, patent of the same family.