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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE ÁCIDOS METILENO FOSFÔNICOS ADEQUADOS PARA PREVENIR INCRUSTAÇÃO EM SISTEMAS AQUOSOS

DeferidaInvention Patent

Application data

Number

PI8407054

Type

Invention Patent

Filing

08/07/1984

Publication

08/13/1985

Progress at the INPI

  1. Filing08/07/84
  2. Publication08/13/85
  3. Examination05/05/87
  4. Allowance09/26/89
  5. Grant04/24/90
  6. Terminated03/03/92

The patent was granted on 04/24/1990 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: 09/26/1989. 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

C. K. (pessoa física)

US

W. A. (pessoa física)

US

Technical data

Priority claims

US

528, 835 · 09/02/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Deferimento

#9.1

09/26/1989

RPI 988

Exigência - art. 36 da LPI

#6.1

03/21/1989

RPI 961

Exigência - art. 36 da LPI

#6.1

09/06/1988

RPI 933

Solicitação de exame técnico

#4.1

05/05/1987

RPI 863

Notificação de entrada na fase nacional - PCT

#1.3

08/13/1985

RPI 773

Anuidade - prazo legal encerrado

#18.2

03/03/1992

RPI 1109

22.2

06/12/1990

RPI 1022

Concessão da patente

#16.1

04/24/1990

RPI 1015

Notificação para pagamento de retribuição

#13.1

01/23/1990

RPI 1003

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