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Official data from INPI

COMPOSICAO PARA MATERIAIS ANTIATRITO,MATERIAL POLIMERICO ANTIATRITO PARA USO EM PECAS DE ATRITO E OBJETO MANUFATURADO PARA PECAS CORREDICAS DE ATRITO

Em AnáliseInvention Patent

Application data

Number

PI7500746

Type

Invention Patent

Filing

02/05/1975

Publication

-

Progress at the INPI

  1. Filing02/05/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant11/10/81
  6. Expired08/03/93

The letters patent expired on 08/03/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 06/26/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

L. S. (pessoa física)

Inventors

P. V. (pessoa física)

P. N. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

06/26/1984

RPI 714

Concessão da patente

#16.1

11/10/1981

RPI 577

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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