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Official data from INPI

PROCESSO PARA UTILIZACAO DE CINZA VOLANTE PARA REMOCAO DE DIOXIDO DE ENXOFRE DE GAS DE CHMINE, E, APERFEICOAMENTO NA REMOCAO DE DIOXIDO DE ENXOFRE COM GAS DE CHAMINE

ConcedidaInvention Patent

Application data

Number

PI7907829

Type

Invention Patent

Filing

03/06/1979

Publication

-

Progress at the INPI

  1. Filing03/06/79
  2. Publication
  3. Examination10/19/82
  4. Allowance09/04/84
  5. Grant03/26/85
  6. Expired05/02/95

The letters patent expired on 05/02/1995: 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: 03/26/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

P. S. (pessoa física)

Inventors

J. C. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/26/1985

RPI 753

Notificação para pagamento de retribuição

#13.1

12/26/1984

RPI 740

Deferimento

#9.1

09/04/1984

RPI 724

Exigência - art. 36 da LPI

#6.1

02/21/1984

RPI 696

Republicação - classificação IPC

#15.11

09/06/1983

RPI 672

Conhecimento de parecer técnico

#7.1

08/02/1983

RPI 667

Solicitação de exame técnico

#4.1

10/19/1982

RPI 626

Carta-patente expirada

#21.1

05/02/1995

RPI 1274

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