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Official data from INPI

CÉLULA ALCALINA E PROCESSO DE INIBIÇÃO DE DESPRENDIMENTO DE GÁS NA MESMA.

ConcedidaInvention Patent

Application data

Number

PI7907045

Type

Invention Patent

Filing

10/30/1979

Publication

-

Progress at the INPI

  1. Filing10/30/79
  2. Publication
  3. Examination10/13/82
  4. Allowance11/01/83
  5. Grant05/29/84
  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: 05/29/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

P.R. Mallory & Co. Inc.

US

Inventors

P. F. (pessoa física)

R. E. (pessoa física)

Technical data

IPC Classification

Priority claims

US

957.387 · 11/03/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/29/1984

RPI 710

Notificação para pagamento de retribuição

#13.1

02/14/1984

RPI 695

Deferimento

#9.1

11/01/1983

RPI 680

Exigência - art. 36 da LPI

#6.1

04/12/1983

RPI 651

Solicitação de exame técnico

#4.1

10/13/1982

RPI 625

Carta-patente expirada

#21.1

05/02/1995

RPI 1274

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