(11) 98705-3426
TrademarkIQ iconTrademarkIQ
Back to search
Official data from INPI

GUIA DE ONDA DIELÉTRICA DE BIRREFRINGÊNCIA CIRCULAR

Prazo de SigiloInvention Patent

Application data

Number

PI8902942

Type

Invention Patent

Filing

05/31/1989

Publication

02/06/1990

Progress at the INPI

  1. Filing05/31/89
  2. Publication02/06/90
  3. Examination10/29/91
  4. Allowance03/01/94
  5. Grant07/26/94
  6. Expired12/22/09

The letters patent expired on 12/22/2009: 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: 08/01/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Pirelli General plc

GB

See this company's full portfolio

Inventors

C. S. (pessoa física)

IT

Technical data

IPC Classification

Priority claims

IT

20804 A/88 · 05/31/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

08/01/1989

RPI 980

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era G02B 6/22.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

Patente extinta em 31/05/2004

12/22/2009

RPI 2033

Concessão da patente

#16.1

07/26/1994

RPI 1234

Deferimento

#9.1

03/01/1994

RPI 1213

Solicitação de exame técnico

#4.1

10/29/1991

RPI 1091

Publicação do pedido de patente

#3.1

02/06/1990

RPI 1005

Related

Same category

Patent monitoring

Track this patent in real time.

Receive alerts on INPI events, decisions, and expiry dates for your portfolio.