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Official data from INPI

MÉTODO PARA TRATAMENTO DE FORMAÇÕES SUBTERRÂNEAS

PublicadaInvention Patent

Application data

Number

PI8800186

Type

Invention Patent

Filing

01/14/1988

Publication

08/30/1988

Progress at the INPI

  1. Filing01/14/88
  2. Publication08/30/88
  3. Examination11/27/90
  4. Allowance05/24/94
  5. Grant12/27/94
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 08/30/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

D. I. (pessoa física)

US

Inventors

D. T. (pessoa física)

US

T. W. (pessoa física)

US

W. W. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

004.385 · 01/16/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

08/30/1988

RPI 932

Pedido de patente depositado

#2.1

05/03/1988

RPI 915

Carta-patente expirada

#21.1

Patente extinta em 14/01/2003

09/02/2008

RPI 1965

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

05/24/1994

RPI 1225

14.1

03/16/1993

RPI 1163

Solicitação de exame técnico

#4.1

11/27/1990

RPI 1043

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