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Official data from INPI

PROCESSO PARA PRODUCAO DE NEGRO DE FUMO PELOTIZADO

Em AnáliseInvention Patent

Application data

Number

PI7900455

Type

Invention Patent

Filing

02/22/1978

Publication

-

Progress at the INPI

  1. Filing02/22/78
  2. Publication
  3. Examination
  4. Allowance03/01/83
  5. Grant08/30/83
  6. Expired05/31/94

The letters patent expired on 05/31/1994: 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: 10/11/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

PHILLIPS PETROLEUM CO

See this company's full portfolio

Inventors

C. P. (pessoa física)

M. K. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

10/11/1988

RPI 938

Concessão da patente

#16.1

08/30/1983

RPI 671

Notificação para pagamento de retribuição

#13.1

06/21/1983

RPI 661

Deferimento

#9.1

03/01/1983

RPI 645

6.2

02/16/1982

RPI 591

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

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