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Official data from INPI

APERFEICOAMENTO EM PAPEL QUE REAGE A FALSIFICACAO POR AGENTES QUIMICOS

Em AnáliseInvention Patent

Application data

Number

PI7904551

Type

Invention Patent

Filing

08/02/1978

Publication

-

Progress at the INPI

  1. Filing08/02/78
  2. Publication
  3. Examination05/11/82
  4. Allowance05/10/83
  5. Grant11/29/83
  6. Expired04/18/95

The letters patent expired on 04/18/1995: 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: 07/16/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

V. P. (pessoa física)

Inventors

V. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

07/16/1985

RPI 769

Concessão da patente

#16.1

11/29/1983

RPI 684

Notificação para pagamento de retribuição

#13.1

09/27/1983

RPI 675

Deferimento

#9.1

05/10/1983

RPI 655

Solicitação de exame técnico

#4.1

05/11/1982

RPI 603

Carta-patente expirada

#21.1

04/18/1995

RPI 1272

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