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Official data from INPI

APERFEIÇOAMENTO EM UM PROCESSO PARA A ESTERIFICAÇÃO.

ConcedidaInvention Patent

Application data

Number

PI8004026

Type

Invention Patent

Filing

06/27/1980

Publication

-

Progress at the INPI

  1. Filing06/27/80
  2. Publication
  3. Examination02/08/83
  4. Allowance04/16/85
  5. Grant10/29/85
  6. Expired09/12/95

The letters patent expired on 09/12/1995: 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: 10/29/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Exxon Research And Egineering Company

US

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Inventors

W. M. (pessoa física)

Technical data

Priority claims

US

053,258 · 06/29/1979

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/29/1985

RPI 784

Notificação para pagamento de retribuição

#13.1

08/06/1985

RPI 772

Deferimento

#9.1

04/16/1985

RPI 756

Exigência - art. 36 da LPI

#6.1

02/14/1984

RPI 695

Solicitação de exame técnico

#4.1

02/08/1983

RPI 642

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era C10M 1/14.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

09/12/1995

RPI 1293

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