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Official data from INPI

PROCESSO PARA PURIFICAÇÃO DE ÁCIDO SULFÚRICO RESIDUAL, A 65 ATÉ 95%, CONTENDO FLUORETO, DISPOSITIVO PARA O MESMO, E CAMPÂNULA PARA O DITO DISPOSITIVO.

ConcedidaInvention Patent
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Application data

Number

PI8004331

Type

Invention Patent

Filing

07/11/1980

Publication

-
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Progress at the INPI

  1. Filing07/11/80
  2. Publication
  3. Examination01/18/83
  4. Allowance11/16/88
  5. Grant07/25/89
  6. Expired09/19/95

The letters patent expired on 09/19/1995: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 07/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

H. A. (pessoa física)

DE

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Inventors

S. R. (pessoa física)

Technical data

IPC Classification

C01B 17/90

Priority claims

DE

P 29 28 598.1 · 07/14/1979

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/25/1989

RPI 979

Notificação para pagamento de retribuição

#13.1

03/07/1989

RPI 959

Deferimento

#9.1

11/16/1988

RPI 943

Exigência - art. 36 da LPI

#6.1

04/05/1988

RPI 911

Exigência - art. 36 da LPI

#6.1

10/06/1987

RPI 885

Conhecimento de parecer técnico

#7.1

04/15/1986

RPI 808

Exigência - art. 36 da LPI

#6.1

01/17/1984

RPI 691

Solicitação de exame técnico

#4.1

01/18/1983

RPI 639

Carta-patente expirada

#21.1

09/19/1995

RPI 1294

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