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Official data from INPI

LENTE OFTÁLMICA.

ConcedidaInvention Patent

Application data

Number

PI8101927

Type

Invention Patent

Filing

03/31/1981

Publication

06/07/1983

Progress at the INPI

  1. Filing03/31/81
  2. Publication06/07/83
  3. Examination08/27/85
  4. Allowance09/02/86
  5. Grant06/02/87
  6. Expired09/24/96

The letters patent expired on 09/24/1996: 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: 06/02/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

A. C. (pessoa física)

Ao, Inc

US

See this company's full portfolio

Inventors

W. T. (pessoa física)

Technical data

IPC Classification

Priority claims

US

232.755 · 02/09/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/02/1987

RPI 867

Notificação para pagamento de retribuição

#13.1

12/23/1986

RPI 844

Deferimento

#9.1

09/02/1986

RPI 828

Solicitação de exame técnico

#4.1

08/27/1985

RPI 775

Publicação do pedido de patente

#3.1

06/07/1983

RPI 659

14.1

02/01/1983

RPI 641

Carta-patente expirada

#21.1

09/24/1996

RPI 1347

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