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Official data from INPI

PROCESSO CÍCLICO PARA RECUPERAR CONTEÚDOS DE ÁLCALI DE DEPÓSITOS DE TRONA

ConcedidaInvention Patent
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Application data

Number

PI8200244

Type

Invention Patent

Filing

01/18/1982

Publication

11/23/1982
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Progress at the INPI

  1. Filing01/18/82
  2. Publication11/23/82
  3. Examination04/19/83
  4. Allowance08/11/87
  5. Grant02/23/88
  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.

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Latest action published by the INPI: 02/23/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

F. C. (pessoa física)

US

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Inventors

W. F. (pessoa física)

US

Technical data

IPC Classification

C01D 7/00

Priority claims

US

226,288 · 01/19/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/23/1988

RPI 905

Notificação para pagamento de retribuição

#13.1

12/01/1987

RPI 893

Deferimento

#9.1

08/11/1987

RPI 877

Exigência - art. 36 da LPI

#6.1

09/30/1986

RPI 832

Conhecimento de parecer técnico

#7.1

01/21/1986

RPI 796

Exigência - art. 36 da LPI

#6.1

12/04/1984

RPI 737

Solicitação de exame técnico

#4.1

04/19/1983

RPI 652

Publicação do pedido de patente

#3.1

11/23/1982

RPI 631

Pedido de patente depositado

#2.1

03/09/1982

RPI 594

Carta-patente expirada

#21.1

Patente extinta em 18/01/97

07/01/2008

RPI 1956

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