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Official data from INPI

REFINADOR DO TIPO DE DISCO

ConcedidaInvention Patent

Application data

Number

PI7801809

Type

Invention Patent

Filing

03/22/1978

Publication

-

Progress at the INPI

  1. Filing03/22/78
  2. Publication
  3. Examination
  4. Allowance07/19/83
  5. Grant01/31/84
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 01/31/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

KOPPERS COMPANY, INC

US

Inventors

S. P. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

730.827 · 03/24/1977

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

01/31/1984

RPI 693

Notificação para pagamento de retribuição

#13.1

11/16/1983

RPI 682

Deferimento

#9.1

07/19/1983

RPI 665

Exigência - art. 36 da LPI

#6.1

11/30/1982

RPI 632

6.2

01/12/1982

RPI 586

Carta-patente expirada

#21.1

Patente extinta em 22/03/93

08/19/2008

RPI 1963

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