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Official data from INPI

PROCESSO PARA REMOVER COMPONENTES ACIDOS DE UMA CORRENTE GASOSA,SOLUCAO DE LAVAGEM E COMPOSICAO

ConcedidaInvention Patent

Application data

Number

PI7708271

Type

Invention Patent

Filing

12/14/1976

Publication

-

Progress at the INPI

  1. Filing12/14/76
  2. Publication
  3. Examination
  4. Allowance11/16/82
  5. Grant06/28/83
  6. Expired07/20/93

The letters patent expired on 07/20/1993: 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: 06/28/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

EXXON RESEARCH ENGINEERING CO

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Inventors

S. G. (pessoa física)

S. D. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/28/1983

RPI 662

Notificação para pagamento de retribuição

#13.1

03/22/1983

RPI 648

Deferimento

#9.1

11/16/1982

RPI 630

15

02/02/1982

RPI 589

Exigência - art. 36 da LPI

#6.1

01/05/1982

RPI 585

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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