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

DISPOSITIVO ATENUADOR DE SONS

Arquivada/ExtintaInvention PatentPCT · US1989004733

Application data

Number

PI8907128

Type

Invention Patent

Filing

10/20/1989

Publication

02/13/1991

PCT

US1989004733

Progress at the INPI

  1. Filing10/20/89
  2. Publication02/13/91
  3. Examination03/09/93
  4. Allowance01/18/94
  5. Grant08/30/94
  6. Expired12/29/09

The letters patent expired on 12/29/2009: 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: 12/29/2009. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Donaldson Company, Inc

US

See this company's full portfolio

Inventors

C. R. (pessoa física)

US

D. M. (pessoa física)

US

J. R. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

260.818 · 10/21/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 20/10/2004

12/29/2009

RPI 2034

Concessão da patente

#16.1

08/30/1994

RPI 1239

Notificação para pagamento de retribuição

#13.1

05/10/1994

RPI 1223

Deferimento

#9.1

01/18/1994

RPI 1207

Solicitação de exame técnico

#4.1

03/09/1993

RPI 1162

Retificação

#15.6

12/01/1992

RPI 1148

Retificação

#15.3

09/22/1992

RPI 1138

Notificação de entrada na fase nacional - PCT

#1.3

02/13/1991

RPI 1054

Patent monitoring

Track this patent in real time.

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