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Official data from INPI

TRANSDUTOR ACÚSTICO PARA FERRAMENTA DE PERFILAGEM DE PERFURAÇÃO.

PublicadaInvention Patent

Application data

Number

PI8702506

Type

Invention Patent

Filing

05/15/1987

Publication

02/23/1988

Progress at the INPI

  1. Filing05/15/87
  2. Publication02/23/88
  3. Examination11/13/90
  4. Allowance12/01/92
  5. Grant07/27/93
  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: 02/23/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

M. C. (pessoa física)

US

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Inventors

C. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

866.560 · 05/23/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

02/23/1988

RPI 905

Pedido de patente depositado

#2.1

08/18/1987

RPI 878

Carta-patente expirada

#21.1

Patente extinta em 15/05/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

07/27/1993

RPI 1182

Notificação para pagamento de retribuição

#13.1

04/20/1993

RPI 1168

Deferimento

#9.1

12/01/1992

RPI 1148

Exigência - art. 36 da LPI

#6.1

05/26/1992

RPI 1121

Solicitação de exame técnico

#4.1

11/13/1990

RPI 1041

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