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Official data from INPI

CONJUNTO DE REGULAGEM AUTOMÁTICA SENSÍVEL À PRESSÃO, PROCESSO PARA REGULAR AUTOMATICAMENTE O FLUXO DE SÓLIDOS EM PARTÍCULAS ATRAVÉS DE UMA VÁLVULA

ConcedidaInvention Patent

Application data

Number

PI8307442

Type

Invention Patent

Filing

07/12/1983

Publication

07/17/1984

Progress at the INPI

  1. Filing07/12/83
  2. Publication07/17/84
  3. Examination02/24/87
  4. Allowance10/04/88
  5. Grant08/29/89
  6. Terminated09/05/95

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

Stone & Webster Engineering Corporation

US

See this company's full portfolio

Inventors

R. N. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

400.397 · 07/21/1982

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

01/24/1989

RPI 953

Deferimento

#9.1

10/04/1988

RPI 937

Exigência - art. 36 da LPI

#6.1

01/12/1988

RPI 899

Solicitação de exame técnico

#4.1

02/24/1987

RPI 853

11.7

02/17/1987

RPI 852

Arquivamento - Art. 33 da LPI

#11.1

12/23/1986

RPI 844

Notificação de entrada na fase nacional - PCT

#1.3

07/17/1984

RPI 717

Anuidade - prazo legal encerrado

#18.2

09/05/1995

RPI 1292

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