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Official data from INPI

PROCESSO PARA AUMENTAR A DENSIDADE DE UM MATERIAL CERÂMICO, DE UM MATERIAL DE NITRETO DE SILICIO, DE UM MATERIAL DE CARBONETO DE SILICIO E DE UM MATERIAL DE BOROSSILICATO DE ALUMINIO

Em ExigênciaInvention Patent

Application data

Number

PI8504941

Type

Invention Patent

Filing

10/07/1985

Publication

07/22/1986

Progress at the INPI

  1. Filing10/07/85
  2. Publication07/22/86
  3. Examination09/20/88
  4. Allowance09/17/91
  5. Grant06/30/92
  6. Terminated09/19/95

The patent was granted on 06/30/1992 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 06/13/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Babcock & Wilcox Company

US

See this company's full portfolio

Inventors

P. B. (pessoa física)

US

V. K. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

06/659.139 · 10/09/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

6.2

06/13/1989

RPI 973

Solicitação de exame técnico

#4.1

09/20/1988

RPI 935

Publicação do pedido de patente

#3.1

07/22/1986

RPI 822

Pedido de patente depositado

#2.1

12/17/1985

RPI 791

Anuidade - prazo legal encerrado

#18.2

09/19/1995

RPI 1294

Concessão da patente

#16.1

06/30/1992

RPI 1126

Republicação - classificação IPC

#15.11

04/07/1992

RPI 1114

Notificação para pagamento de retribuição

#13.1

01/21/1992

RPI 1103

Deferimento

#9.1

09/17/1991

RPI 1085

Exigência - art. 36 da LPI

#6.1

08/14/1990

RPI 1028

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