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Official data from INPI

Processo para a preparação de soluções aquosas de nitrito de cálcio.

ConcedidaInvention Patent

Application data

Number

PI8104589

Type

Invention Patent

Filing

07/17/1981

Publication

04/06/1982

Progress at the INPI

  1. Filing07/17/81
  2. Publication04/06/82
  3. Examination04/17/84
  4. Allowance03/31/87
  5. Grant09/29/87
  6. Terminated09/25/90

The patent was granted on 09/29/1987 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 09/29/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

W.R. Grace & Co.

US

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Inventors

G. M. (pessoa física)

R. M. (pessoa física)

Technical data

IPC Classification

Priority claims

US

189.993 · 09/23/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/29/1987

RPI 884

Deferimento

#9.1

03/31/1987

RPI 858

Exigência - art. 36 da LPI

#6.1

04/01/1986

RPI 806

Exigência - art. 36 da LPI

#6.1

03/05/1985

RPI 750

6.2

10/02/1984

RPI 728

Solicitação de exame técnico

#4.1

04/17/1984

RPI 704

Publicação do pedido de patente

#3.1

04/06/1982

RPI 598

Anuidade - prazo legal encerrado

#18.2

09/25/1990

RPI 1034

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