IP Code Section 55,
Regulations Rule 1100,
Regulations Rule 1101,
Regulations Rule 1102,
PRo-PCT Rule 40(b),
IPO Fee Structure,
Part II General Provisions Sections 1,
Part II General Provisions Sections 2,
Part II General Provisions Sections 3,
Part II General Provisions Sections 4,
Part II General Provisions Sections 5,
Part II General Provisions Sections 6
To maintain the patent application or patent, an annual fee shall be paid upon the expiration of four years from the date of the international publication regardless of the language of publication, and on each subsequent anniversary of such date. Payment may be made within three months before the due date. The obligation to pay the annual fees shall terminate should the application be withdrawn, refused, or cancelled. If an annual fee is not paid within the prescribed time, a notice of non-payment shall be published in the IPOPHLE-Gazette. After publication, a notice shall also be immediately mailed to the patent owner, applicant, or resident agent. Within a grace period of six months from the publication of the notice of non-payment in the IPOPHL E-Gazette, the annual fee plus the prescribed surcharge for delayed payment and the publication fee must be paid in full. In case of failure to pay the annual fee, surcharge, and the publication fee within the grace period, a notice that the application is deemed withdrawn or that the patent is considered as lapsed as of the date following the expiration of the original period within which the annual fee was due, shall be issued and published in the IPOPHL E-Gazette and recorded in the appropriate Register of the Office.