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Official data from INPI

MECANISMO DIFERENCIAL DO TIPO DE PINHÃO HELICOIDAL DOSADOR DE TORQUE POSSUINDO UMA TENDÊNCIA DE TORQUE DE ATRITO INERENTE.

Em AnáliseInvention Patent

Application data

Number

PI8703251

Type

Invention Patent

Filing

06/26/1987

Publication

04/26/1988

Progress at the INPI

  1. Filing06/26/87
  2. Publication04/26/88
  3. Examination10/25/88
  4. Allowance08/06/91
  5. Grant05/26/92
  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

D. C. (pessoa física)

US

Inventors

W. D. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

906.844 · 09/12/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/25/1988

RPI 940

Publicação do pedido de patente

#3.1

04/26/1988

RPI 914

Pedido de patente depositado

#2.1

09/01/1987

RPI 880

Carta-patente expirada

#21.1

Patente extinta em 26/06/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

05/26/1992

RPI 1121

Notificação para pagamento de retribuição

#13.1

12/03/1991

RPI 1096

Deferimento

#9.1

08/06/1991

RPI 1079

Exigência - art. 36 da LPI

#6.1

03/12/1991

RPI 1058

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