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Official data from INPI

REVESTIMENTO DE BAIXO ATRITO E RESISTENTE A ABRASAO PARA FILME TRANSPARENTE

Em ExigênciaInvention Patent

Application data

Number

PI7901467

Type

Invention Patent

Filing

03/13/1978

Publication

-

Progress at the INPI

  1. Filing03/13/78
  2. Publication
  3. Examination
  4. Allowance02/08/83
  5. Grant09/27/83
  6. Expired06/21/94

The letters patent expired on 06/21/1994: 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: 08/07/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MINNESOTA MINING & MFG

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Inventors

L. L. (pessoa física)

Z. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

08/07/1984

RPI 720

Concessão da patente

#16.1

09/27/1983

RPI 675

Notificação para pagamento de retribuição

#13.1

06/07/1983

RPI 659

Deferimento

#9.1

02/08/1983

RPI 642

Exigência - art. 36 da LPI

#6.1

07/06/1982

RPI 611

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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