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Official data from INPI

MISTURAS DE ACLARADORES OTICOS,E SUA APLICACAO

ConcedidaInvention Patent

Application data

Number

PI7808616

Type

Invention Patent

Filing

12/31/1977

Publication

-

Progress at the INPI

  1. Filing12/31/77
  2. Publication
  3. Examination
  4. Allowance08/23/83
  5. Grant03/27/84
  6. Expired05/24/94

The letters patent expired on 05/24/1994: 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: 03/27/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

HOECHST AG

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Inventors

E. R. (pessoa física)

G. D. (pessoa física)

P. H. (pessoa física)

R. G. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/27/1984

RPI 701

Notificação para pagamento de retribuição

#13.1

12/13/1983

RPI 686

Deferimento

#9.1

08/23/1983

RPI 670

Exigência - art. 36 da LPI

#6.1

11/16/1982

RPI 630

6.2

12/01/1981

RPI 580

Carta-patente expirada

#21.1

05/24/1994

RPI 1225

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