Official data from INPI

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ConcedidaInvention Patent

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Application data

Number

PI8101635

Type

Invention Patent

Filing

03/19/1981

Publication

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Progress at the INPI

Filing03/19/81
Publication
Examination09/27/83
Allowance06/11/85
Grant12/31/85
Expired09/24/96

The letters patent expired on 09/24/1996: 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: 12/31/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Pulp And Paper Research Institute Of Canada.

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Inventors

G. A. (pessoa física)

Technical data

IPC Classification

C23F 13/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/31/1985

RPI 793

Notificação para pagamento de retribuição

#13.1

09/24/1985

RPI 779

Deferimento

#9.1

06/11/1985

RPI 764

8.1

02/26/1985

RPI 749

Republicação - classificação IPC

#15.11

12/18/1984

RPI 739

Exigência - art. 36 da LPI

#6.1

08/14/1984

RPI 721

Solicitação de exame técnico

#4.1

09/27/1983

RPI 675

Carta-patente expirada

#21.1

09/24/1996

RPI 1347

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