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Official data from INPI

FERRAMENTA PARA USO NA RECUPERAÇÃO DE UMA BUCHA DE DESGASTE DE UM CONJUNTO DE BOCA DE POÇO

Arquivada/ExtintaInvention Patent
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Application data

Number

PI9001507

Type

Invention Patent

Filing

04/02/1990

Publication

04/16/1991
View on INPI

Progress at the INPI

  1. Filing04/02/90
  2. Publication04/16/91
  3. Examination07/27/93
  4. Allowance05/24/94
  5. Grant01/31/95
  6. Expired05/18/10

The letters patent expired on 05/18/2010: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 05/18/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Cameron Iron Works Usa, Inc

US

C. C. (pessoa física)

US

See this company's full portfolio

Inventors

K. G. (pessoa física)

GB

Technical data

IPC Classification

E21B 33/03

Priority claims

GB

8907446.2 · 04/03/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 02/04/2005

05/18/2010

RPI 2054

Transferência deferida

#25.1

11/11/1997

RPI 1406

Transferência deferida

#25.1

11/04/1997

RPI 1405

Concessão da patente

#16.1

01/31/1995

RPI 1261

Notificação para pagamento de retribuição

#13.1

09/27/1994

RPI 1243

Deferimento

#9.1

05/24/1994

RPI 1225

Solicitação de exame técnico

#4.1

07/27/1993

RPI 1182

Publicação do pedido de patente

#3.1

04/16/1991

RPI 1063

Pedido de patente depositado

#2.1

08/07/1990

RPI 1027

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