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Official data from INPI

TRANSMISSOR DE CORRENTE DE DOIS FIOS COM REGULADOR DE VOLTAGEM APERFEICOADO

Em AnáliseInvention Patent

Application data

Number

PI7900336

Type

Invention Patent

Filing

03/13/1978

Publication

-

Progress at the INPI

  1. Filing03/13/78
  2. Publication
  3. Examination11/24/81
  4. Allowance07/27/82
  5. Grant03/29/83
  6. Expired05/31/94

The letters patent expired on 05/31/1994: 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: 05/31/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ROSEMOUNT INC

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Inventors

D. C. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

22.9

05/31/1983

RPI 658

Concessão da patente

#16.1

03/29/1983

RPI 649

Notificação para pagamento de retribuição

#13.1

12/14/1982

RPI 634

Deferimento

#9.1

07/27/1982

RPI 614

Solicitação de exame técnico

#4.1

11/24/1981

RPI 579

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

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