Elemento de tubo interior para um aparelho de ensaio de sondagem e processo para a fabricação de um elemento de tubo interior.

1. Filing12/29/81
2. Publication10/19/82
3. Examination04/05/83
4. Allowance04/03/84
5. Grant10/30/84
6. In force12/29/01

The patent was granted on 10/30/1984 and is in force until 12/29/2001. Until then, no one may make, use or sell the invention in Brazil without the owner's authorisation.

Protection valid until:12/29/2001

Latest action published by the INPI: 10/30/1984. We update with every new RPI gazette, published weekly.