US3171402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas heating structure
Assignee: Individual
•
Filing: 1962-06-11
•
Granted: 1965-03-02
•
Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Richard E Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:31
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/002; F24C3/004; F24H; F24H3/00; F24H3/02; F24H3/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A COMBINATION IN A GAS-FIRED HEATER: AN UPSTANDING FORWARD HEATING ELEMENT PROVIDING A VERTICAL COMBUSTION CHAMBER TO ACCOMMODATE A GAS BURNER AT ITS LOWER END AND HAVING SPACED FORWARD AND REARWARD WALLS; A REARWARD UPSTANDING AIR ENAMBER ELEMENT SPACED REARWARDLY FROM SAID HEATING ELEMENT AND HAVING SPACED FORWARD AND REARWARD WALLS; A BOX RIGIDLY MOUNTED UPON BOTH OF SAID ELEMENTS, AND HAVING A REARWARD WALL SUBSTANTIALLY VERTICALLY ALIGNED WITH THE REARWARD WALL OF SAID AIR CHAMBER ELEMENT AND HAVING A FORWARD WALL SUBSTANTIALLY VERTICALLY ALIGNED WITH THE REARWARD PORTION OF SAID COMBUSTION CHAMBER ELEMENT, SAID BOX HAVING A BOTTOM WALL PROVIDED WITH A FIRST PORT COMMUNICATION WITH THE COMBUSTION CHAMBER AND A SECOND PORT COMMUNICATING WITH SAID AIR CHAMBER, SAID BOX HAVING A TOP WALL
Claim 2
Dependent Claim
126 words
IN A COMBINATION IN A GAS-FIRED HEATER: AN UPSTANDING FORWARD HEATING ELEMENT PROVIDING A VERTICAL COMBUSTION CHAMBER TO ACCOMMODATE A GAS BURNER AT ITS LOWER END AND HAVING SPACED FORWARD AND REARWARD WALLS; A REARWARD UPSTANDING AIR ENAMBER ELEMENT SPACED REARWARDLY FROM SAID HEATING ELEMENT AND HAVING SPACED FORWARD AND REARWARD WALLS; A BOX RIGIDLY MOUNTED UPON BOTH OF SAID ELEMENTS, AND HAVING A REARWARD WALL SUBSTANTIALLY VERTICALLY ALIGNED WITH THE REARWARD WALL OF SAID AIR CHAMBER ELEMENT AND HAVING A FORWARD WALL SUBSTANTIALLY VERTICALLY ALIGNED WITH THE REARWARD PORTION OF SAID COMBUSTION CHAMBER ELEMENT, SAID BOX HAVING A BOTTOM WALL PROVIDED WITH A FIRST PORT COMMUNICATION WITH THE COMBUSTION CHAMBER AND A SECOND PORT COMMUNICATING WITH SAID AIR CHAMBER, SAID BOX HAVING A TOP WALL
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |