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Official data from INPI

Método para determinar a resistência global dos estratos.

ConcedidaInvention Patent

Application data

Number

PI8106784

Type

Invention Patent

Filing

10/21/1981

Publication

07/06/1982

Progress at the INPI

  1. Filing10/21/81
  2. Publication07/06/82
  3. Examination10/13/82
  4. Allowance07/09/85
  5. Grant12/31/85
  6. Terminated08/07/90

The patent was granted on 12/31/1985 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: 12/31/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Coal Industry (Patents) Limited

GB

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Inventors

H. A. (pessoa física)

K. (pessoa física)

M. W. (pessoa física)

N. J. (pessoa física)

W. R. (pessoa física)

Technical data

IPC Classification

Priority claims

GB

80/33883 · 10/21/1980

GB

81/14912 · 05/14/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/31/1985

RPI 793

Deferimento

#9.1

07/09/1985

RPI 768

Republicação - classificação IPC

#15.11

06/11/1985

RPI 764

Exigência - art. 36 da LPI

#6.1

10/23/1984

RPI 731

Solicitação de exame técnico

#4.1

10/13/1982

RPI 625

Publicação do pedido de patente

#3.1

07/06/1982

RPI 611

Pedido de patente depositado

#2.1

12/08/1981

RPI 581

Anuidade - prazo legal encerrado

#18.2

08/07/1990

RPI 1027

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