US3320932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater leg construction
Assignee: Individual
•
Filing: 1965-10-01
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Granted: 1967-05-23
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Expires: 1985-10-01
Abstract
No abstract record available.
Inventors
- 👤 Irvin D Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:13
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A HOT WATER HEATER HAVING AN OUTER TANK SHELL, A BOTTOM CLOSURE, AN INNER SHELL ADAPTED TO CONTAIN WATER HAVING A FLOOR SPACED ABOVE SAID CLOSURE AND DEFINIONF A FIRE BOX THEREBETWEEN, THE IMPROVEMENT COMPRISING: A PLURALITY OF SEPARATE LEG SUPPORTS FOR SAID HEATER; EACH OF SAID LEGS COMPRISING A BODY MEMBER FABRICATED FROM A MATERIAL HAVING A LOW COEFFICIENT OF THERMAL CONDUCTIVITY; A CENTRAL PASSAGE IN SAID BODY MEMBER OPENING UPWARDLY OF ONE END; A PLURALITY OF RADIAL PORTS IN SAID BODY MEMBER COMMUNICATING WITH SAID CENTRAL PASSAGE; SAID ONE END OF SAID BODY MEMBER BEING RECEIVED IN AN APERTURE IN SAID BOTTOM CLOSURE OF SAID HEATER WITH SAID PASSAGE IN COMMUNICATION WITH SAID FIRE BOX; AND MEANS SECURING SAID BODY MEMBER TO SAID HEATER.
Claim 2
Dependent Claim
127 words
IN A HOT WATER HEATER HAVING AN OUTER TANK SHELL, A BOTTOM CLOSURE, AN INNER SHELL ADAPTED TO CONTAIN WATER HAVING A FLOOR SPACED ABOVE SAID CLOSURE AND DEFINIONF A FIRE BOX THEREBETWEEN, THE IMPROVEMENT COMPRISING: A PLURALITY OF SEPARATE LEG SUPPORTS FOR SAID HEATER; EACH OF SAID LEGS COMPRISING A BODY MEMBER FABRICATED FROM A MATERIAL HAVING A LOW COEFFICIENT OF THERMAL CONDUCTIVITY; A CENTRAL PASSAGE IN SAID BODY MEMBER OPENING UPWARDLY OF ONE END; A PLURALITY OF RADIAL PORTS IN SAID BODY MEMBER COMMUNICATING WITH SAID CENTRAL PASSAGE; SAID ONE END OF SAID BODY MEMBER BEING RECEIVED IN AN APERTURE IN SAID BOTTOM CLOSURE OF SAID HEATER WITH SAID PASSAGE IN COMMUNICATION WITH SAID FIRE BOX; AND MEANS SECURING SAID BODY MEMBER TO SAID HEATER.
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) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |