Patent · US Expired

Heating unit

US4250867A · kind A · utility

7Cited by
8References
5Claims
0Family size

Inventors

Key dates

Filing dateOct 3, 1977
Grant dateFeb 17, 1981
Priority date—
Expiry dateOct 3, 1997

Classification

  • Technology area (CPC F)Mechanical Engineering; Lighting; Heating
  • CPC primaryF24B7/025
  • WIPO fieldThermal processes and apparatus
  • WIPO sectorMechanical engineering

Abstract

A fireplace heater unit having outside air forced around and over the heater unit before being discharged from the bottom front of the unit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.