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Official data from INPI

PROCESSO PARA O TRATAMENTO DE SÍLICA

Em AnáliseInvention Patent

Application data

Number

PI8603582

Type

Invention Patent

Filing

07/29/1986

Publication

04/22/1987

Progress at the INPI

  1. Filing07/29/86
  2. Publication04/22/87
  3. Examination08/11/87
  4. Allowance04/30/91
  5. Grant11/26/91
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 08/11/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Sherwin-Williams Company

US

See this company's full portfolio

Inventors

G. G. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

777.461 · 09/18/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

08/11/1987

RPI 877

Publicação do pedido de patente

#3.1

04/22/1987

RPI 861

Pedido de patente depositado

#2.1

01/06/1987

RPI 846

Carta-patente expirada

#21.1

Patente extinta em 29/07/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

11/26/1991

RPI 1095

Republicação - classificação IPC

#15.11

11/19/1991

RPI 1094

Notificação para pagamento de retribuição

#13.1

08/13/1991

RPI 1080

Deferimento

#9.1

04/30/1991

RPI 1065

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