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Official data from INPI

CAVILHA DE EXPANSÃO PARA A ANCORAGEM EM PERFURAÇÕES PRODUZIDAS COM ALARGAMENTO CÔNICO PARA O INTERIOR

Em AnáliseInvention Patent

Application data

Number

PI8203650

Type

Invention Patent

Filing

06/23/1982

Publication

06/14/1983

Progress at the INPI

  1. Filing06/23/82
  2. Publication06/14/83
  3. Examination10/25/83
  4. Allowance09/18/84
  5. Grant02/25/86
  6. Terminated04/02/96

The patent was granted on 02/25/1986 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: 05/05/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

A. F. (pessoa física)

DE

See this company's full portfolio

Inventors

A. F. (pessoa física)

DE

Technical data

IPC Classification

Priority claims

DE

P 31 24 685.0 · 06/24/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

05/05/1987

RPI 863

Concessão da patente

#16.1

02/25/1986

RPI 801

15.15

12/03/1985

RPI 789

110

09/17/1985

RPI 778

Republicação - classificação IPC

#15.11

02/26/1985

RPI 749

Recurso

#12.1

01/02/1985

RPI 741

Deferimento

#9.1

09/18/1984

RPI 726

Pedido de certificado de adição de invenção

#5.1

03/20/1984

RPI 700

Solicitação de exame técnico

#4.1

10/25/1983

RPI 679

Publicação do pedido de patente

#3.1

06/14/1983

RPI 660

Pedido de patente depositado

#2.1

08/10/1982

RPI 616

Anuidade - prazo legal encerrado

#18.2

04/02/1996

RPI 1322

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