Fireplace heat exchanger

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view of a fireplace heat exchanger, showing my new design.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a side elevational view thereof.

Referenced Cited
U.S. Patent Documents
227171 May 1880 Logan et al.
3190282 June 1965 Bauer
4164931 August 21, 1979 Jenkins
Foreign Patent Documents
493543 August 1919 FRX
2403519 May 1979 FRX
Patent History
Patent number: D271711
Type: Grant
Filed: May 26, 1981
Date of Patent: Dec 6, 1983
Inventor: Allen L. Stewart (Clayton, NC)
Primary Examiner: Catherine E. Kemper
Attorney: William C. Lawton
Application Number: 6/267,030
Classifications
Current U.S. Class: D23/136; D23/95
International Classification: D2303;