US3907531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter for an oil burner
Assignee: Lee Raymond Organization Inc
•
Filing: 1974-10-01
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Granted: 1975-09-23
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Expires: 1994-10-01
Abstract
Abstract An air filter for an oil burner comprises a strip of flexible air filtering material for cleaning air passing therethrough. Cords affixed to and extending from the ends of the strip are provided for tying the strip around an air intake of an oil burner over the openings therein thereby filtering air drawn into the oil burner.
Inventors
- 👤 Merle D Lee
- 👤 Lloyd R Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:56
CPC Classifications
B; B01; B01D; B01D46/00; F; F23; F23C; F23C7/00; F23D; F23D11/00; F23D11/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
AN AIR FILTER FOR AN OIL BURNER HAVING A SUBSTANTIALY CYLINDRICAL AIR INTAKE HAVING A PLURALITY OF OPENINGS THEREIN FOR DRAWING AIR INTO THE OIL BURNER, SAID AIR FILTER COMPRISING A STRIP OF FLEXIIBLE AIR FILTERING MATERIAL FOR CLEANING AIR PAS ING THERETHROUGH SAID STRIP HAVING SPACED OPPOSITE ENDS WITH HOLES FORMED THERETHROUGH, AND SPACED CORDS AFFIXED TO AND EXTENDING FROM EACH OF THE ENDS OF THE STRIP ADJACENT THE SIDES THEREOF, SAID CORDS PASSING THROUGH THE HOLES THROUGH THE STRIP, TYING THE STRIP AROUND AN AIR INTAKE OF AN OIL BURNER OVER THE OPENINGS THEREIN THEREBY FILTERING AIR DRAWN INTO THE OIL BURNER.
Claim 2
Dependent Claim
104 words
AN AIR FILTER FOR AN OIL BURNER HAVING A SUBSTANTIALY CYLINDRICAL AIR INTAKE HAVING A PLURALITY OF OPENINGS THEREIN FOR DRAWING AIR INTO THE OIL BURNER, SAID AIR FILTER COMPRISING A STRIP OF FLEXIIBLE AIR FILTERING MATERIAL FOR CLEANING AIR PAS ING THERETHROUGH SAID STRIP HAVING SPACED OPPOSITE ENDS WITH HOLES FORMED THERETHROUGH, AND SPACED CORDS AFFIXED TO AND EXTENDING FROM EACH OF THE ENDS OF THE STRIP ADJACENT THE SIDES THEREOF, SAID CORDS PASSING THROUGH THE HOLES THROUGH THE STRIP, TYING THE STRIP AROUND AN AIR INTAKE OF AN OIL BURNER OVER THE OPENINGS THEREIN THEREBY FILTERING AIR DRAWN INTO THE OIL BURNER.
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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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |