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Official data from INPI

MÁSCARA DE FACE DE FILTRAÇÃO EM FORMA DE TAÇA RESILIENTE

PublicadaInvention Patent

Application data

Number

PI8701592

Type

Invention Patent

Filing

04/06/1987

Publication

01/26/1988

Progress at the INPI

  1. Filing04/06/87
  2. Publication01/26/88
  3. Examination03/05/91
  4. Allowance04/07/92
  5. Grant11/24/92
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 01/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Minnesota Mining and Manufacturing Company

US

See this company's full portfolio

Inventors

A. M. (pessoa física)

US

H. B. (pessoa física)

US

J. D. (pessoa física)

US

Technical data

Priority claims

US

848,757 · 04/07/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

01/26/1988

RPI 901

Pedido de patente depositado

#2.1

07/14/1987

RPI 873

Carta-patente expirada

#21.1

Patente extinta em 06/04/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

11/24/1992

RPI 1147

Notificação para pagamento de retribuição

#13.1

09/08/1992

RPI 1136

Deferimento

#9.1

04/07/1992

RPI 1114

Solicitação de exame técnico

#4.1

03/05/1991

RPI 1057

11.8

02/26/1991

RPI 1056

Arquivamento - Art. 33 da LPI

#11.1

12/04/1990

RPI 1044

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