How to maintain the Patent validity?
To maintain Patent Validity, the patentee must pay annuities in due course. The First Year of Patent Validity shall be calculated from the Date of Patent Granting. The Validity Year of Patent shall start from the Expiration Date of the preceding Validity Year and terminate on the same day and month of the succeeding Year. Due Date of Annuity Payment shall be the Anniversary of the Date of Patent Granting. The first annuity shall be paid upon the patent grant. The annuity for each of the subsequent years must be paid within 6 months before the Due Date. A six-month grace period is however permissible subject to the penalty of 10 percent of the said annuity for each month over due.
