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Official data from INPI

PROCESSO CONTINUO PARA REMOCAO,COM SOLVENTE,DE CERA DE OLEO DE PETROLEO CEROSO

Em AnáliseInvention Patent

Application data

Number

PI7806098

Type

Invention Patent

Filing

09/18/1978

Publication

-

Progress at the INPI

  1. Filing09/18/78
  2. Publication
  3. Examination04/27/82
  4. Allowance03/01/83
  5. Grant03/25/86
  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: 10/03/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

TEXACO DEVELOPMENT CORP

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Inventors

B. O. (pessoa física)

B. P. (pessoa física)

H. C. (pessoa física)

P. H. (pessoa física)

S. A. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

10/03/1989

RPI 989

Concessão da patente

#16.1

03/25/1986

RPI 805

133

10/29/1985

RPI 784

Recurso

#12.1

06/21/1983

RPI 661

Deferimento

#9.1

03/01/1983

RPI 645

Pedido de certificado de adição de invenção

#5.1

09/14/1982

RPI 621

Solicitação de exame técnico

#4.1

04/27/1982

RPI 601

Conhecimento de parecer técnico

#7.1

01/26/1982

RPI 588

Carta-patente expirada

#21.1

05/03/1994

RPI 1222

18.8

01/09/1990

RPI 1001

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