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Official data from INPI

COMPOSIÇÕES DE OLEO LUBRIFICANTE.

ConcedidaInvention Patent

Application data

Number

PI7905907

Type

Invention Patent

Filing

09/14/1979

Publication

-

Progress at the INPI

  1. Filing09/14/79
  2. Publication
  3. Examination06/29/82
  4. Allowance10/06/87
  5. Grant04/26/88
  6. Expired04/25/95

The letters patent expired on 04/25/1995: 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: 04/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Exxon Research And Engineering Company

US

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Inventors

C. K. (pessoa física)

R. J. (pessoa física)

W. E. (pessoa física)

Technical data

IPC Classification

Priority claims

US

943.208 · 09/18/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/26/1988

RPI 914

Notificação para pagamento de retribuição

#13.1

02/09/1988

RPI 903

Deferimento

#9.1

10/06/1987

RPI 885

Conhecimento de parecer técnico

#7.1

08/23/1983

RPI 670

Solicitação de exame técnico

#4.1

06/29/1982

RPI 610

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era C10M 1/54.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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