US3291966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating element
Assignee: INTERSTATE SANITATION CO
•
Filing: 1964-04-27
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Granted: 1966-12-13
•
Expires: 1984-04-27
Abstract
No abstract record available.
Inventors
- 👤 Albert L Bunting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:54
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/16; A; A47; A47K; A47K10/00; A47K10/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN COMBINATION WITH A BLOWER HAVING A CASING, AND MEANS DEFINING A BLOWER INLET OPENING IN SAID CASING; A HEATING ASSEMBLY COMPRISING A CIRCULAR PLATE HAVING AN AREA GREATER THAN THE AREA OF SAID INLET OPENING, A PLURALITY OF INSULATING POSTS SUPPORTED UPON SAID CASING AROUND THE PERIPHERY OF SAID INLET OPENING AND FIXEDLY SECURED TO SAID PLATE TO SUPPORT SAID PLATE IN SPACED RELATIONSHIP FROM SAID CASING TO DEFINE AN ANNULAR INLET PASSAGE BETWEEN SAID PLATE AND SAID CASING COAXIAL WITH SAID INLET OPENING, AN ELECTRICAL HEATING ELEMENT SUPPORTED UPON SAID POSTS WITHIN SAID INLET PASSAGE EXTENDING SUBSTANTIALLY ENTIRELY AROUND THE PERIPHERY OF SAID INLET OPENING WITH OPPOSITE ENDS OF SAID HEATING ELEMENTS CIRCUMFERENTIALLY SPACED FROM EACH OTHER TO FORM A CIRCUMFERENTIAL GAP IN SAID HEATING ELEMENT, AND TEMPERATURE RESPONSIVE MEANS FOR CONTROLLING OPERATION OF SAID HEATING ELEMENT CONNECTED TO ONE OF SAID OPPOSITE ENDS OF SAID HEATING ELEMENT AND LOCATED WITHIN SAID INLET PASSAGE ADJACENT SAID GAP.
Claim 2
Dependent Claim
159 words
IN COMBINATION WITH A BLOWER HAVING A CASING, AND MEANS DEFINING A BLOWER INLET OPENING IN SAID CASING; A HEATING ASSEMBLY COMPRISING A CIRCULAR PLATE HAVING AN AREA GREATER THAN THE AREA OF SAID INLET OPENING, A PLURALITY OF INSULATING POSTS SUPPORTED UPON SAID CASING AROUND THE PERIPHERY OF SAID INLET OPENING AND FIXEDLY SECURED TO SAID PLATE TO SUPPORT SAID PLATE IN SPACED RELATIONSHIP FROM SAID CASING TO DEFINE AN ANNULAR INLET PASSAGE BETWEEN SAID PLATE AND SAID CASING COAXIAL WITH SAID INLET OPENING, AN ELECTRICAL HEATING ELEMENT SUPPORTED UPON SAID POSTS WITHIN SAID INLET PASSAGE EXTENDING SUBSTANTIALLY ENTIRELY AROUND THE PERIPHERY OF SAID INLET OPENING WITH OPPOSITE ENDS OF SAID HEATING ELEMENTS CIRCUMFERENTIALLY SPACED FROM EACH OTHER TO FORM A CIRCUMFERENTIAL GAP IN SAID HEATING ELEMENT, AND TEMPERATURE RESPONSIVE MEANS FOR CONTROLLING OPERATION OF SAID HEATING ELEMENT CONNECTED TO ONE OF SAID OPPOSITE ENDS OF SAID HEATING ELEMENT AND LOCATED WITHIN SAID INLET PASSAGE ADJACENT SAID GAP.
References Cited (Backward Citations)
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Cited
US2011856A
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GB483039A
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US2332639A
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GB611087A
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US3089942A
Cited
US3196250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |