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Official data from INPI

PROCESSO E APARELHO PARA PREPARACAO DE ACIDO FOSFORICO

ConcedidaInvention Patent
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Application data

Number

PI7804003

Type

Invention Patent

Filing

11/04/1977

Publication

-
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Progress at the INPI

  1. Filing11/04/77
  2. Publication
  3. Examination
  4. Allowance03/13/84
  5. Grant09/25/84
  6. Expired11/30/93

The letters patent expired on 11/30/1993: 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: 09/25/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

P. S. (pessoa física)

Inventors

D. A. (pessoa física)

Technical data

IPC Classification

C01B 25/22

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/25/1984

RPI 727

Notificação para pagamento de retribuição

#13.1

07/03/1984

RPI 715

Deferimento

#9.1

03/13/1984

RPI 699

Exigência - art. 36 da LPI

#6.1

08/16/1983

RPI 669

Exigência - art. 36 da LPI

#6.1

07/27/1982

RPI 614

6.2

12/22/1981

RPI 583

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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