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Official data from INPI

APERFEICOAMENTO NO SISTEMA DE ELIMINACAO DOS GASES QUEIMADOS DOS FORNOS POCOS

Em AnáliseInvention Patent

Application data

Number

PI7708346

Type

Invention Patent

Filing

12/15/1977

Publication

-

Progress at the INPI

  1. Filing12/15/77
  2. Publication
  3. Examination
  4. Allowance
  5. Grant08/31/82
  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: 02/23/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

M. S. (pessoa física)

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Inventors

M. J. (pessoa física)

S. A. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

18.8

02/23/1988

RPI 905

Anuidade - prazo legal encerrado

#18.2

12/15/1987

RPI 895

Concessão da patente

#16.1

08/31/1982

RPI 619

Notificação para pagamento de retribuição

#13.1

01/26/1982

RPI 588

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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