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Official data from INPI

PROCESSO PARA ISOMERIZAR UMA CARGA DE ALIMENTACAO CONTENDO HIDROCARBONETOS ALQUIL AROMATICOS DE C8

ConcedidaInvention Patent

Application data

Number

PI7805929

Type

Invention Patent

Filing

09/14/1977

Publication

-

Progress at the INPI

  1. Filing09/14/77
  2. Publication
  3. Examination
  4. Allowance03/08/83
  5. Grant06/30/87
  6. Expired05/03/94

The letters patent expired on 05/03/1994: 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: 06/30/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ATLANTIC RICHFIELD CO

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Inventors

R. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/30/1987

RPI 871

110

02/17/1987

RPI 852

Recurso

#12.1

06/28/1983

RPI 662

Deferimento

#9.1

03/08/1983

RPI 646

6.2

12/22/1981

RPI 583

Pedido de certificado de adição de invenção

#5.1

10/13/1981

RPI 573

Carta-patente expirada

#21.1

05/03/1994

RPI 1222

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