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Official data from INPI

COMPOSICAO DE GRAXA LUBRIFICANTE

ConcedidaInvention Patent

Application data

Number

PI7900534

Type

Invention Patent

Filing

01/30/1978

Publication

-

Progress at the INPI

  1. Filing01/30/78
  2. Publication
  3. Examination
  4. Allowance03/15/88
  5. Grant09/27/88
  6. Expired05/31/94

The letters patent expired on 05/31/1994: 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: 09/27/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

EXXON RESEARCH ENGINEERING CO

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Inventors

C. G. (pessoa física)

H. G. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/27/1988

RPI 936

Notificação para pagamento de retribuição

#13.1

07/19/1988

RPI 926

Deferimento

#9.1

03/15/1988

RPI 908

Conhecimento de parecer técnico

#7.1

01/31/1984

RPI 693

6.2

06/22/1982

RPI 609

Pedido de certificado de adição de invenção

#5.1

04/06/1982

RPI 598

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

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