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

Filtro fibroso de eletreto compreendendo fibras de poliolefina para remover material em partículas de um fluído gasoso

PublicadaInvention Patent

Application data

Number

PI8900286

Type

Invention Patent

Filing

01/24/1989

Publication

09/19/1989

Progress at the INPI

  1. Filing01/24/89
  2. Publication09/19/89
  3. Examination10/29/91
  4. Allowance08/05/97
  5. Grant07/28/98
  6. Expired12/18/12

The letters patent expired on 12/18/2012: 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: 09/19/1989. 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

J. R. (pessoa física)

US

M. E. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

147,989 · 01/25/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

09/19/1989

RPI 987

Pedido de patente depositado

#2.1

03/07/1989

RPI 959

Carta-patente expirada

#21.1

Patente extinta em 24/01/2009

12/18/2012

RPI 2189

Concessão da patente

#16.1

07/28/1998

RPI 1440

15.33

09/09/1997

RPI 1397

Republicação - classificação IPC

#15.11

09/02/1997

RPI 1396

Deferimento

#9.1

08/05/1997

RPI 1392

Exigência - art. 36 da LPI

#6.1

04/23/1996

RPI 1325

Solicitação de exame técnico

#4.1

10/29/1991

RPI 1091

Patent monitoring

Track this patent in real time.

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