I have applied for a provisional patent on USPTO website. The USPTO people told me that it will take between 4-6 weeks untill they process my application, and in a meanwhile I cannot disclosure my invention in public. Does it make sense? Why should I wait 4-6 weeks? Isn't it supposed to be immediate on the day of the filing? So if I go public now, will it hurt my patent rights?
Assuming you filed correctly, you will end up with a filing date based on when you filed. If you filed electronically, it will be that date. If you filed by mail it will be the date it is received unless you used USPS Express Mail in a specific manner. In that case you will get the date of mailing. It does take time to get a filing receipt in the mail. That receipt does not provide any indication that you did anything more than follow the basic formal filing requirements. When you disclose is up to you, not to the USPTO but what and when you disclose can affect your rights. Even after you are sure your application is acknowledged as filed by the USPTO, only the material contained in the application will be safe to disclose.