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Official data from INPI

PROCESSO PARA PREPARAR PRODUTOS PREMIUM,A PARTIR DE PETROLEO CRU

ConcedidaInvention Patent

Application data

Number

PI7900718

Type

Invention Patent

Filing

02/06/1978

Publication

-

Progress at the INPI

  1. Filing02/06/78
  2. Publication
  3. Examination10/13/81
  4. Allowance03/08/83
  5. Grant06/24/86
  6. Expired06/21/94

The letters patent expired on 06/21/1994: 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: 06/24/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ENGELHARD MIN & CHEM

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Inventors

B. D. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/24/1986

RPI 818

110

02/04/1986

RPI 798

Recurso

#12.1

06/28/1983

RPI 662

Deferimento

#9.1

03/08/1983

RPI 646

6.2

06/22/1982

RPI 609

Pedido de certificado de adição de invenção

#5.1

04/06/1982

RPI 598

Solicitação de exame técnico

#4.1

10/13/1981

RPI 573

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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