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Official data from INPI

PROCESSO DE FABRICAÇÃO DE VENTANEIRA INCLINADA ESPIRALADA DE DUPLA CÂMADA COM REVESTIMENTO DE REFRATÁRIO E BICO ESTAMPADO

ConcedidaInvention Patent
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Application data

Number

PI8102155

Type

Invention Patent

Filing

10/09/1981

Publication

11/03/1981
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Progress at the INPI

  1. Filing10/09/81
  2. Publication11/03/81
  3. Examination09/27/83
  4. Allowance09/02/86
  5. Grant06/02/87
  6. Terminated06/20/95

The patent was granted on 06/02/1987 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: 06/02/1987. 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

D. M. (pessoa física)

Technical data

IPC Classification

C21B 7/16

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/02/1987

RPI 867

Republicação - classificação IPC

#15.11

03/17/1987

RPI 856

Notificação para pagamento de retribuição

#13.1

12/23/1986

RPI 844

Deferimento

#9.1

09/02/1986

RPI 828

Exigência - art. 36 da LPI

#6.1

09/17/1985

RPI 778

Exigência - art. 36 da LPI

#6.1

11/06/1984

RPI 733

Solicitação de exame técnico

#4.1

09/27/1983

RPI 675

Publicação antecipada

#3.2

11/03/1981

RPI 576

Anuidade - prazo legal encerrado

#18.2

06/20/1995

RPI 1281

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