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Official data from INPI

CONJUNTO DE GAXETA DE CABEÇOTE E PROCESSO PARA FAZÊ-LO

Em AnáliseInvention Patent

Application data

Number

PI8701790

Type

Invention Patent

Filing

04/14/1987

Publication

02/02/1988

Progress at the INPI

  1. Filing04/14/87
  2. Publication02/02/88
  3. Examination06/14/88
  4. Allowance06/04/91
  5. Grant03/31/92
  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: 10/25/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Felt Products MFG. Co.

US

Inventors

G. R. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

851.471 · 04/14/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de certificado de adição de invenção

#5.1

10/25/1988

RPI 940

Solicitação de exame técnico

#4.1

06/14/1988

RPI 921

Publicação do pedido de patente

#3.1

02/02/1988

RPI 902

Pedido de patente depositado

#2.1

07/28/1987

RPI 875

Carta-patente expirada

#21.1

Patente extinta em 14/04/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

03/31/1992

RPI 1113

Notificação para pagamento de retribuição

#13.1

10/01/1991

RPI 1087

Deferimento

#9.1

06/04/1991

RPI 1070

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