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Official data from INPI

SEM TITULO

ConcedidaInvention Patent

Application data

Number

PI8204714

Type

Invention Patent

Filing

08/11/1982

Publication

08/02/1983

Progress at the INPI

  1. Filing08/11/82
  2. Publication08/02/83
  3. Examination10/01/85
  4. Allowance09/02/86
  5. Grant06/02/87
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 06/02/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Coal Industry (Patents) Limited

GB

See this company's full portfolio

Inventors

D. F. (pessoa física)

GB

J. C. (pessoa física)

GB

T. C. (pessoa física)

GB

Technical data

IPC Classification

Priority claims

GB

81/24440 · 08/11/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/02/1987

RPI 867

Notificação para pagamento de retribuição

#13.1

12/23/1986

RPI 844

Deferimento

#9.1

09/02/1986

RPI 828

Solicitação de exame técnico

#4.1

10/01/1985

RPI 780

Publicação do pedido de patente

#3.1

08/02/1983

RPI 667

Pedido de patente depositado

#2.1

09/28/1982

RPI 623

Carta-patente expirada

#21.1

Patente extinta em 11/08/97

07/01/2008

RPI 1956

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