79. The joint owner of a patent application or patent may notify the other joint owners
that he is waiving his share for their benefit. As from the date on which such waiver is
entered in the National Register of Patents, said joint owner shall be discharged of any
obligations with regard to the other joint owners where they consent to said waiver. The joint
owners shall divide up the waived share in proportion to their rights in the joint ownership,
unless otherwise agreed.
80. The provisions of Articles 77 to 79 above shall apply unless otherwise stipulated.
The joint owners may derogate therefrom at any time by means of regulations for joint
ownership.
Subsection VI
Miscellaneous provisions
81. The exclusive right to work deriving from the invention patent protected by this
title shall end when its period of validity expires.
The holder of such an exclusive right may waive it at any time, for either the entire
invention or for one or more claims to the patent.
Waiver must take the form of a written declaration by the patent owner or his agent. In
the latter case, a special waiver authorization must be attached to the declaration.
If the patent is jointly owned, waiver may only be effected if it is required by all of the
joint owners.
Where licenses or encumbrances have been entered in the National Register of Patents,
the declaration of waiver shall only be entertained if it is accompanied by the consent of the
owners of such rights.
Waiver shall be entered in the National Register of Patents. It shall come into force on
the date of such entry.
82. A patent owner who has not paid the prescribed fees to renew his rights within the
time periods laid down shall forfeit said rights.
However, payment of the prescribed fees may be validly effected during an additional
period of six months starting from the date on which the rights are forfeited.
Where the prescribed fees have not been paid by the due date, a formal notice shall be
sent by the entity responsible for industrial property by registered letter with
acknowledgement of receipt to the patent owner or his agent, indicating that he will forfeit his
rights if payment is not made before the expiry of the time period of six months provided for
in the previous paragraph.
Lack of notice shall not incur the liability of the entity responsible for industrial
property and shall not constitute grounds for restoring the patent owner’s rights.
83. A patent owner who has failed to pay the prescribed fees upon expiry of the sixmonth time period laid down in the second paragraph of Article 82 above shall have his rights
revoked.
84. Revocation shall be recorded through a written, substantiated decision by the entity
responsible for industrial property and notified to the patent owner or his agent in the forms
fixed by regulation.
Revocation shall come into force on the due date of the missed payment.