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Official data from INPI

PROCESSO PARA CONTROLE DE CICLO DE RESFRIAMENTO

Em AnáliseInvention Patent
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Application data

Number

PI8301139

Type

Invention Patent

Filing

03/08/1983

Publication

10/16/1984
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Progress at the INPI

  1. Filing03/08/83
  2. Publication10/16/84
  3. Examination08/26/86
  4. Allowance11/13/90
  5. Grant07/30/91
  6. Terminated08/29/95

The patent was granted on 07/30/1991 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 11/28/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Usinas Siderúrgicas de Minas Gerais S/A - USIMINAS

MG, BR

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Inventors

E. S. (pessoa física)

BR

F. M. (pessoa física)

BR

J. S. (pessoa física)

BR

Technical data

IPC Classification

C21D 1/26

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Conhecimento de parecer técnico

#7.1

11/28/1989

RPI 997

Retificação

#15.6

10/25/1988

RPI 940

Retificação

#15.3

05/31/1988

RPI 919

Solicitação de exame técnico

#4.1

08/26/1986

RPI 827

Publicação do pedido de patente

#3.1

10/16/1984

RPI 730

Pedido de patente depositado

#2.1

04/19/1983

RPI 652

Anuidade - prazo legal encerrado

#18.2

08/29/1995

RPI 1291

Concessão da patente

#16.1

07/30/1991

RPI 1078

Notificação para pagamento de retribuição

#13.1

02/26/1991

RPI 1056

Deferimento

#9.1

11/13/1990

RPI 1041

Deferimento

#9.1

03/01/1990

RPI 1007

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