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Official data from INPI

PRATO DE VÁLVULA

ConcedidaInvention Patent

Application data

Number

PI8301641

Type

Invention Patent

Filing

03/30/1983

Publication

12/13/1983

Progress at the INPI

  1. Filing03/30/83
  2. Publication12/13/83
  3. Examination11/12/85
  4. Allowance
  5. Grant08/29/89
  6. Terminated04/25/95

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

USS Engineers and Consultants, Inc.

US

See this company's full portfolio

Inventors

A. T. (pessoa física)

GB

Technical data

IPC Classification

Priority claims

GB

8209663 · 04/01/1982

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

06/06/1989

RPI 972

Exigência - art. 36 da LPI

#6.1

08/23/1988

RPI 931

6.2

02/24/1987

RPI 853

Solicitação de exame técnico

#4.1

11/12/1985

RPI 786

Publicação do pedido de patente

#3.1

12/13/1983

RPI 686

Pedido de patente depositado

#2.1

05/17/1983

RPI 656

Anuidade - prazo legal encerrado

#18.2

04/25/1995

RPI 1273

20.4

01/29/1991

RPI 1052

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