I want to apply for two patents.
The first one is based on a journal article (obviously written by me) which is published a few months before.
My first question is: Is it legal/possible to apply for a patent based on an already published journal article? Is it a kind of self-plagiarism?
The second patent application which I am currently writing is based on a manuscript which I am planning to submit to a journal soon.
So, my second question is: Will it be a problem if I submit both the patent application and the manuscript to a journal at the same time? Should I write this to the journal editor?
My third question is: Is it unethical to keep the diagrams in the paper and patent almost the same?