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Official data from INPI

SISTEMA DE LIMPEZA DE GÁS DE COQUERIA PARA CONTROLE DE PODER CALORÍFICO

Prazo de SigiloInvention Patent

Application data

Number

PI8903648

Type

Invention Patent

Filing

07/24/1989

Publication

01/29/1991

Progress at the INPI

  1. Filing07/24/89
  2. Publication01/29/91
  3. Examination04/21/92
  4. Allowance09/21/93
  5. Grant05/31/94
  6. Terminated11/21/95

The patent was granted on 05/31/1994 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 10/31/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Usinas Siderúrgicas de Minas Gerais S/A

MG, BR

Usinas Siderúrgicas de Minas Gerais S/A - Usiminas

MG, BR

Inventors

R. S. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

10/31/1989

RPI 993

Anuidade - prazo legal encerrado

#18.2

11/21/1995

RPI 1303

Republicação - classificação IPC

#15.11

04/04/1995

RPI 1270

Concessão da patente

#16.1

05/31/1994

RPI 1226

Notificação para pagamento de retribuição

#13.1

02/22/1994

RPI 1212

Deferimento

#9.1

09/21/1993

RPI 1190

Solicitação de exame técnico

#4.1

04/21/1992

RPI 1116

Publicação do pedido de patente

#3.1

01/29/1991

RPI 1052

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