To help you plan ahead, below is a roadmap of patch sets for Oracle Database major releases 11.1 and beyond, showing planned release dates and the duration of their support lives in relationship to the overall release life. The chart is by nature somewhat simplified so be sure to read the details below it to help you interpret it correctly.
Information is shown for current major releases since 11.1 only (i.e. no future releases). Patchsets are released on different platforms over time. Once a patchset is released on the first platforms (usually Linux), the schedule for release on other platforms will be added to the table above.