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Official data from INPI

PROCESSO PARA DESLIGNIFICACAO E SACARIFICACAO DE MATERIAIS VEGETAIS DE LIGNOCELULOSE COM O EMPREGO DE SOLVENTES

ConcedidaInvention Patent
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Application data

Number

PI7808684

Type

Invention Patent

Filing

08/31/1977

Publication

-
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Progress at the INPI

  1. Filing08/31/77
  2. Publication
  3. Examination01/17/84
  4. Allowance12/29/87
  5. Grant06/28/88
  6. Expired05/31/94

The letters patent expired on 05/31/1994: 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: 06/28/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

THERMOFORM BAU FORSCHUNG AG

Inventors

P. L. (pessoa física)

P. C. (pessoa física)

Technical data

IPC Classification

D21C 3/20

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/28/1988

RPI 923

Notificação para pagamento de retribuição

#13.1

05/10/1988

RPI 916

Deferimento

#9.1

12/29/1987

RPI 897

Exigência - art. 36 da LPI

#6.1

08/19/1986

RPI 826

Republicação - classificação IPC

#15.11

05/27/1986

RPI 814

Exigência - art. 36 da LPI

#6.1

01/07/1986

RPI 794

Solicitação de exame técnico

#4.1

01/17/1984

RPI 691

102

11/16/1983

RPI 682

Pedido de recurso

#12.3

07/13/1982

RPI 612

Arquivamento - Art. 34 da LPI

#11.5

04/20/1982

RPI 600

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

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