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Official data from INPI

PROCESSO PARA MELHORAR A ATIVIDADE MULTIFUNCIONAL DE UM CONCENTRADO DE ADITIVO DE OLEO

ConcedidaInvention Patent

Application data

Number

PI7802640

Type

Invention Patent

Filing

04/29/1977

Publication

-

Progress at the INPI

  1. Filing04/29/77
  2. Publication
  3. Examination
  4. Allowance05/14/85
  5. Grant11/26/85
  6. Expired07/06/93

The letters patent expired on 07/06/1993: 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: 11/26/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

EXXON RESEARCH ENGINEERING CO

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Inventors

E. R. (pessoa física)

G. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/26/1985

RPI 788

Notificação para pagamento de retribuição

#13.1

09/03/1985

RPI 776

Deferimento

#9.1

05/14/1985

RPI 760

Exigência - art. 36 da LPI

#6.1

11/20/1984

RPI 735

Exigência - art. 36 da LPI

#6.1

02/28/1984

RPI 697

Exigência - art. 36 da LPI

#6.1

03/15/1983

RPI 647

Carta-patente expirada

#21.1

07/06/1993

RPI 1179

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