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Official data from INPI

ESTRUTURA DE FOLHA ELETROFOTOGRAFICA E CHAPA LITOGRAFICA FORMADA EM IMAGEM ELETROFOTOGRAFICAMENTE

Em AnáliseInvention Patent

Application data

Number

PI8001699

Type

Invention Patent

Filing

03/22/1979

Publication

-

Progress at the INPI

  1. Filing03/22/79
  2. Publication
  3. Examination01/11/83
  4. Allowance08/09/83
  5. Grant02/28/84
  6. Expired05/16/95

The letters patent expired on 05/16/1995: 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: 12/10/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MINNESOTA MINING & MFG

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Inventors

P. D. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

12/10/1985

RPI 790

Concessão da patente

#16.1

02/28/1984

RPI 697

Notificação para pagamento de retribuição

#13.1

11/29/1983

RPI 684

Deferimento

#9.1

08/09/1983

RPI 668

Solicitação de exame técnico

#4.1

01/11/1983

RPI 638

Carta-patente expirada

#21.1

05/16/1995

RPI 1276

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