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Official data from INPI

SEM TITULO

Em AnáliseInvention Patent
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Application data

Number

PI8006729

Type

Invention Patent

Filing

10/20/1980

Publication

-
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Progress at the INPI

  1. Filing10/20/80
  2. Publication
  3. Examination09/08/82
  4. Allowance08/14/84
  5. Grant02/26/85
  6. Expired11/14/95

The letters patent expired on 11/14/1995: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 09/23/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

M. R. (pessoa física)

CH

Inventors

A. W. (pessoa física)

B. D. (pessoa física)

Technical data

IPC Classification

C21B 13/02

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

09/23/1986

RPI 831

Concessão da patente

#16.1

02/26/1985

RPI 749

Notificação para pagamento de retribuição

#13.1

12/11/1984

RPI 738

Deferimento

#9.1

08/14/1984

RPI 721

Exigência - art. 36 da LPI

#6.1

11/16/1983

RPI 682

Solicitação de exame técnico

#4.1

09/08/1982

RPI 620

Carta-patente expirada

#21.1

11/14/1995

RPI 1302

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