US3237622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater
Assignee: —
•
Filing: —
•
Granted: 1966-03-01
•
Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:46
CPC Classifications
F; F24; F24B; F24B5/00; F24B5/02; F24B5/021; F24B5/026; F24C; F24C3/00; F24C3/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A HEATER CONSTRUCTION COMPRISING (1) A FIRE BOX WITH TOP, BOTTOM AND SIDE WALLS, (2) A PRIMARY AIR INLET ADJACENT THE BOTTOM OF SAID FIRE BOX, (3) AN EXHAUST OUTLET ADJACENT THE TOP WALL OF SAID FIRE BOX, (4) A SECONDARY AIR INLET COMPRISING A PLURALITY OF APERTURES IN THE TOP WALL OF SAID FIRE BOX AND EXTENDING ACROSS SUBSTANTIALLY THE LENGTH OF SAID TOP WALL, (5) MEANS DEFINING A CONDUIT EXTENDING ALONG SAID TOP WALL OF SAID FIRE BOX FOR CONDUCTING AIR TO SAID APERTURES, AND
Claim 2
Dependent Claim
87 words
A HEATER CONSTRUCTION COMPRISING (1) A FIRE BOX WITH TOP, BOTTOM AND SIDE WALLS, (2) A PRIMARY AIR INLET ADJACENT THE BOTTOM OF SAID FIRE BOX, (3) AN EXHAUST OUTLET ADJACENT THE TOP WALL OF SAID FIRE BOX, (4) A SECONDARY AIR INLET COMPRISING A PLURALITY OF APERTURES IN THE TOP WALL OF SAID FIRE BOX AND EXTENDING ACROSS SUBSTANTIALLY THE LENGTH OF SAID TOP WALL, (5) MEANS DEFINING A CONDUIT EXTENDING ALONG SAID TOP WALL OF SAID FIRE BOX FOR CONDUCTING AIR TO SAID APERTURES, AND
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |