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Official data from INPI

VÁLVULA DE RETENÇÃO DE LAMA

Em AnáliseInvention Patent

Application data

Number

PI8906568

Type

Invention Patent

Filing

12/19/1989

Publication

09/18/1990

Progress at the INPI

  1. Filing12/19/89
  2. Publication09/18/90
  3. Examination04/02/91
  4. Allowance05/17/94
  5. Grant12/27/94
  6. Terminated07/16/96

The patent was granted on 12/27/1994 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 08/19/1997. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Drilex Systems, Inc

US

Inventors

R. J. (pessoa física)

US

T. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

305.213 · 02/01/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Transferência indeferida

#25.2

08/19/1997

RPI 1394

Anuidade - prazo legal encerrado

#18.2

07/16/1996

RPI 1337

Concessão da patente

#16.1

12/27/1994

RPI 1256

Notificação para pagamento de retribuição

#13.1

09/27/1994

RPI 1243

Deferimento

#9.1

05/17/1994

RPI 1224

Solicitação de exame técnico

#4.1

04/02/1991

RPI 1061

Publicação do pedido de patente

#3.1

09/18/1990

RPI 1033

Pedido de patente depositado

#2.1

04/10/1990

RPI 1013

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