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Official data from INPI

CONJUNTO DE LENTES DE QUATRO ELEMENTOS

ConcedidaInvention Patent

Application data

Number

PI8202173

Type

Invention Patent

Filing

04/15/1982

Publication

03/29/1983

Progress at the INPI

  1. Filing04/15/82
  2. Publication03/29/83
  3. Examination06/18/85
  4. Allowance04/22/86
  5. Grant11/25/86
  6. Terminated07/18/95

The patent was granted on 11/25/1986 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 11/25/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Minnesota Mining and Manufacturing Company

US

See this company's full portfolio

Inventors

D. V. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

254,947 · 04/16/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/25/1986

RPI 840

Notificação para pagamento de retribuição

#13.1

08/26/1986

RPI 827

Deferimento

#9.1

04/22/1986

RPI 809

Republicação - classificação IPC

#15.11

04/01/1986

RPI 806

Solicitação de exame técnico

#4.1

06/18/1985

RPI 765

Publicação do pedido de patente

#3.1

03/29/1983

RPI 649

Pedido de patente depositado

#2.1

06/01/1982

RPI 606

Anuidade - prazo legal encerrado

#18.2

07/18/1995

RPI 1285

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