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Official data from INPI

PROCESSO PARA PREVENÇÃO DE INCRUSTAÇÕES E CORROSÃO EM CALDEIRAS

ConcedidaInvention Patent

Application data

Number

PI8304921

Type

Invention Patent

Filing

09/06/1983

Publication

04/24/1984

Progress at the INPI

  1. Filing09/06/83
  2. Publication04/24/84
  3. Examination07/01/86
  4. Allowance11/16/88
  5. Grant08/29/89
  6. Terminated02/18/92

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

The Dow Chemical Company

US

See this company's full portfolio

Inventors

F. J. (pessoa física)

US

S. W. (pessoa física)

US

T. J. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

415,069 · 09/07/1982

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

03/07/1989

RPI 959

Deferimento

#9.1

11/16/1988

RPI 943

Conhecimento de parecer técnico

#7.1

06/07/1988

RPI 920

6.2

03/04/1987

RPI 854

Solicitação de exame técnico

#4.1

07/01/1986

RPI 819

Publicação do pedido de patente

#3.1

04/24/1984

RPI 705

Pedido de patente depositado

#2.1

11/08/1983

RPI 681

Anuidade - prazo legal encerrado

#18.2

02/18/1992

RPI 1107

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