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Official data from INPI

APERFEICOAMENTO EM PROCESSO POR VIA UMIDA PARA A MANUFATURA DE ACIDO FOSFORICO ALTAMENTE CONCENTRADO

Em AnáliseInvention Patent

Application data

Number

PI7605283

Type

Invention Patent

Filing

08/13/1975

Publication

-

Progress at the INPI

  1. Filing08/13/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant03/30/82
  6. Expired07/20/93

The letters patent expired on 07/20/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 11/13/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NISSAN CHEMICAL IND LTD

Inventors

I. T. (pessoa física)

I. Y. (pessoa física)

N. S. (pessoa física)

S. Y. (pessoa física)

T. S. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

11/13/1984

RPI 734

Concessão da patente

#16.1

03/30/1982

RPI 597

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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