(11) 98705-3426
TrademarkIQ iconTrademarkIQ
Back to search
Official data from INPI

PROCESSO PARA PRODUCAO DE CARVAO ATIVADO ESFERICO TENDO UMA BAIXA SUSCETIBILIDADE A FORMACAO DE POEIRA

ConcedidaInvention Patent

Application data

Number

PI7900717

Type

Invention Patent

Filing

02/06/1978

Publication

-

Progress at the INPI

  1. Filing02/06/78
  2. Publication
  3. Examination
  4. Allowance07/12/83
  5. Grant01/31/84
  6. Expired06/21/94

The letters patent expired on 06/21/1994: 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

KUREHA CHEMICAL IND CO LTD

See this company's full portfolio

Inventors

H. K. (pessoa física)

N. Y. (pessoa física)

O. Y. (pessoa física)

U. Y. (pessoa física)

W. K. (pessoa física)

Technical data

IPC Classification

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

11/08/1983

RPI 681

Deferimento

#9.1

07/12/1983

RPI 664

15.0

05/18/1982

RPI 604

Exigência - art. 36 da LPI

#6.1

04/13/1982

RPI 599

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

Patent monitoring

Track this patent in real time.

Receive alerts on INPI events, decisions, and expiry dates for your portfolio.