US3368545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air heating door on a fireplace
Assignee: HAROLD R IBBITSON
•
Filing: 1965-05-05
•
Granted: 1968-02-13
•
Expires: 1985-05-05
Abstract
No abstract record available.
Inventors
- 👤 Harold R Ibbitson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:34
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/191; F24B1/192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
HEATING APPARATUS IN COMBINATIJON WITH A FIREPLACE, SAID APPARATUS COMPRISING A HEATING MEMBER HAVING A BACK EXTENDING INTO THE INTERIOR OF SAID FIREPLACE, A FRONT SPACED FORWARDLY FROM SAID BACK TO THEREBY PROVIDE AN AIR PASSAGE, MEANS CONNECTING SAID BACK AND FRONT, SAID FRONT BEING SPACED AT ITS LOWER AND UPPER EXTREMITIES FROM THE BOTTOM AND TOP OF SAID BACK TO THEREBY PROVIDE AN INLET AND AN OUTLET RESPECTIVELY FOR SAID PASSAGE, THE LOWER EXTREMITY OF SAID BACK BEING SPACED FROM THE BOTTOM OF THE FIREPLACE, A DRAFT MEMBER EXTENDING INTO THE LATTER SPACE HAVING HOLES THERETHROUGH TO PERMIT PASSAGE OF AIR
Claim 2
Dependent Claim
102 words
HEATING APPARATUS IN COMBINATIJON WITH A FIREPLACE, SAID APPARATUS COMPRISING A HEATING MEMBER HAVING A BACK EXTENDING INTO THE INTERIOR OF SAID FIREPLACE, A FRONT SPACED FORWARDLY FROM SAID BACK TO THEREBY PROVIDE AN AIR PASSAGE, MEANS CONNECTING SAID BACK AND FRONT, SAID FRONT BEING SPACED AT ITS LOWER AND UPPER EXTREMITIES FROM THE BOTTOM AND TOP OF SAID BACK TO THEREBY PROVIDE AN INLET AND AN OUTLET RESPECTIVELY FOR SAID PASSAGE, THE LOWER EXTREMITY OF SAID BACK BEING SPACED FROM THE BOTTOM OF THE FIREPLACE, A DRAFT MEMBER EXTENDING INTO THE LATTER SPACE HAVING HOLES THERETHROUGH TO PERMIT PASSAGE OF AIR
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |