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Official data from INPI

PROCESSO PARA REMOÇÃO DE REVESTIMENTOS DE SUPERFÍCIE AMOLECÍVEIS POR AQUECIMENTO, CORPO ROTATIVO E APARELHO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9103185

Type

Invention Patent

Filing

07/25/1991

Publication

02/11/1992

Progress at the INPI

  1. Filing07/25/91
  2. Publication02/11/92
  3. Examination01/05/93
  4. Allowance09/23/97
  5. Grant09/29/98
  6. Expired06/04/13

The letters patent expired on 06/04/2013: 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: 06/04/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Minnesota Mining and Manufacturing Company

US

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Inventors

P. W. (pessoa física)

US

Technical data

Priority claims

US

558,302 · 07/26/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 25/07/2011

06/04/2013

RPI 2213

Concessão da patente

#16.1

09/29/1998

RPI 1449

Deferimento

#9.1

09/23/1997

RPI 1399

Solicitação de exame técnico

#4.1

01/05/1993

RPI 1153

Publicação do pedido de patente

#3.1

02/11/1992

RPI 1106

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