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Official data from INPI

ESTRUTURA DE POÇO

PublicadaInvention Patent

Application data

Number

PI8901901

Type

Invention Patent

Filing

04/21/1989

Publication

11/28/1989

Progress at the INPI

  1. Filing04/21/89
  2. Publication11/28/89
  3. Examination12/24/91
  4. Allowance05/31/94
  5. Grant01/31/95
  6. Terminated12/31/96

The patent was granted on 01/31/1995 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: 11/28/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Cameron Iron Works Usa, Inc

US

See this company's full portfolio

Inventors

P. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

EP

88303674.1 · 04/22/1988

US

193.068 · 05/12/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/28/1989

RPI 997

Pedido de patente depositado

#2.1

05/30/1989

RPI 971

Anuidade - prazo legal encerrado

#18.2

12/31/1996

RPI 1361

Concessão da patente

#16.1

01/31/1995

RPI 1261

Notificação para pagamento de retribuição

#13.1

10/04/1994

RPI 1244

Deferimento

#9.1

05/31/1994

RPI 1226

Solicitação de exame técnico

#4.1

12/24/1991

RPI 1099

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