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Official data from INPI

SISTEMA DE FUSÃO ZONAL FLUTUANTE DO SILÍCIO.

ConcedidaInvention Patent
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Application data

Number

PI8005491

Type

Invention Patent

Filing

08/29/1980

Publication

04/27/1982
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Progress at the INPI

  1. Filing08/29/80
  2. Publication04/27/82
  3. Examination08/10/82
  4. Allowance07/09/85
  5. Grant03/25/86
  6. Expired09/26/95

The letters patent expired on 09/26/1995: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 03/25/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Telecomunicações Brasileiras S/A - Telebrás

SP, BR

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Inventors

B. L. (pessoa física)

D. A. (pessoa física)

Technical data

IPC Classification

C01B 33/02C30B 19/00H01L 21/02

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/25/1986

RPI 805

Notificação para pagamento de retribuição

#13.1

11/12/1985

RPI 786

Deferimento

#9.1

07/09/1985

RPI 768

Exigência - art. 36 da LPI

#6.1

01/08/1985

RPI 742

Exigência - art. 36 da LPI

#6.1

01/31/1984

RPI 693

Solicitação de exame técnico

#4.1

08/10/1982

RPI 616

Publicação do pedido de patente

#3.1

04/27/1982

RPI 601

Carta-patente expirada

#21.1

09/26/1995

RPI 1295

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