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Official data from INPI

PROCESSO PARA PREPARACAO DE UM OLEO LUBRIFICANTE COM BAIXO PONTO DE FLUIDEZ

ConcedidaInvention Patent

Application data

Number

PI7601931

Type

Invention Patent

Filing

04/02/1975

Publication

-

Progress at the INPI

  1. Filing04/02/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant09/27/83
  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: 09/27/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

S. R. (pessoa física)

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Inventors

C. J. (pessoa física)

J. G. (pessoa física)

N. E. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/27/1983

RPI 675

110

05/31/1983

RPI 658

120

07/06/1982

RPI 611

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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