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

APARELHO DE AUDIÇÃO, E,PROCESSO PARA MONTAGEM DE UM APARELHO DE AUDIÇÃO

Prazo de SigiloInvention Patent

Application data

Number

PI8903935

Type

Invention Patent

Filing

08/04/1989

Publication

03/20/1990

Progress at the INPI

  1. Filing08/04/89
  2. Publication03/20/90
  3. Examination05/12/92
  4. Allowance12/24/96
  5. Grant08/26/97
  6. Expired05/21/13

The letters patent expired on 05/21/2013: 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: 11/21/1989. 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. C. (pessoa física)

US

R. O. (pessoa física)

US

V. K. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

229,614 · 08/08/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

11/21/1989

RPI 996

Carta-patente expirada

#21.1

Patente extinta em 04/08/2009

05/21/2013

RPI 2211

Concessão da patente

#16.1

08/26/1997

RPI 1395

Deferimento

#9.1

12/24/1996

RPI 1360

Republicação - classificação IPC

#15.11

09/17/1996

RPI 1346

Conhecimento de parecer técnico

#7.1

02/27/1996

RPI 1317

6.2

08/30/1994

RPI 1239

Solicitação de exame técnico

#4.1

05/12/1992

RPI 1119

Publicação do pedido de patente

#3.1

03/20/1990

RPI 1010

Patent monitoring

Track this patent in real time.

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