US3266480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warm air furnace
Assignee: Individual
•
Filing: 1965-09-23
•
Granted: 1966-08-16
•
Expires: 1985-09-23
Abstract
No abstract record available.
Inventors
- 👤 Lorin G Miller
- 👤 James H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:08
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/08; F24H3/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A FLAME CHAMBER FOR POSITIVE PRESSURE WARM AIR FURNACES COMPRISING: (A) A CYLINDRICAL INORGANIC FIBROUS TUBE DEFINING A RESTRICTED UPPERMOST OPENING THROUGH WHICH COMBUSTION GASES PASS, AND CLOSED AT THE LOWERMOST END AND HAVING A TRANSVERSE OPENING THROUGH THE WALLS THEREOF AND FORMING A POSITIVE PRESSURE CHOKE FOR GENERATED COMBUSTION GASES; AND (B) A PLURALITY OF SPACED APART VERTICAL HEAT EXCHANGER TUBES IN CONCENTRIC CONTACT ARRANGEMENT IN SUPPORT OF SAID FIBROUS TUBE, SAID FIBROUS TUBE SHIELDING SAID EXCHANGER TUBES FROM DIRECT FLAME CONTACT WHILE PERMITTING LUMINESCENT HEAT PERMEATION.
Claim 2
Dependent Claim
88 words
A FLAME CHAMBER FOR POSITIVE PRESSURE WARM AIR FURNACES COMPRISING: (A) A CYLINDRICAL INORGANIC FIBROUS TUBE DEFINING A RESTRICTED UPPERMOST OPENING THROUGH WHICH COMBUSTION GASES PASS, AND CLOSED AT THE LOWERMOST END AND HAVING A TRANSVERSE OPENING THROUGH THE WALLS THEREOF AND FORMING A POSITIVE PRESSURE CHOKE FOR GENERATED COMBUSTION GASES; AND (B) A PLURALITY OF SPACED APART VERTICAL HEAT EXCHANGER TUBES IN CONCENTRIC CONTACT ARRANGEMENT IN SUPPORT OF SAID FIBROUS TUBE, SAID FIBROUS TUBE SHIELDING SAID EXCHANGER TUBES FROM DIRECT FLAME CONTACT WHILE PERMITTING LUMINESCENT HEAT PERMEATION.
References Cited (Backward Citations)
US1699732A
Cited
US2117511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |