To file a patent application in Singapore, you have to file
PF1/PF8 together with the prescribed filing fee of S$160.00. Your application should include a set of the specification of your invention, i.e. the description, a claim(s) and a drawing(s) (if any), and an abstract of your invention.
Applicants are required to furnish to the Registrar an address for service in Singapore. This is the address to which all correspondence from the Registry will be sent.
All Patent forms are available at the IPOS counter and downloadable
here.