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Official data from INPI

SISTEMA PARA EQUALIZAÇÃO AUTOMÁTICA DE PRESSÃO DIFERENCIAL EM VÁLVULAS GAVETA

ConcedidaInvention Patent

Application data

Number

PI8304573

Type

Invention Patent

Filing

08/24/1983

Publication

04/02/1985

Progress at the INPI

  1. Filing08/24/83
  2. Publication04/02/85
  3. Examination02/24/87
  4. Allowance12/29/87
  5. Grant08/29/89
  6. Terminated05/02/95

The patent was granted on 08/29/1989 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: 08/29/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Usinas Siderúrgicas de Minas Gerais S/A - USIMINAS

MG, BR

See this company's full portfolio

Inventors

K. E. (pessoa física)

BR

U. M. (pessoa física)

BR

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/29/1989

RPI 984

Notificação para pagamento de retribuição

#13.1

11/01/1988

RPI 941

Deferimento

#9.1

12/29/1987

RPI 897

Solicitação de exame técnico

#4.1

02/24/1987

RPI 853

Publicação do pedido de patente

#3.1

04/02/1985

RPI 754

Pedido de patente depositado

#2.1

11/01/1983

RPI 680

Anuidade - prazo legal encerrado

#18.2

05/02/1995

RPI 1274

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