Patent US4361553A successfully refreshed from Google Patents.
Patent US3148270A successfully refreshed from Google Patents.
US3148270A
Expired / Lapsed
US
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Heating unit
Assignee: Somar Industries Inc
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Filing: 1962-04-27
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Granted: 1964-09-08
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Expires: 1982-04-27
Abstract
No abstract record available.
Inventors
- 👤 Wade S Plummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:56
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/002; F24H3/004; F24D; F24D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
AN ELECTRIC LIQUID HEATER, INCLUDING IN COMBINATION, A METALLIC RADIATOR HAVING A HEAT RADIATING PANEL SECTION AND A BASE SECTION EXTENDING FROM AN END THEREOF, SAID BASE SECTION HAVING A CLOSED CHAMBER THEREIN ADAPTED TO CONTAIN A LIQUID AND SAID BASE SECTION HAVING AN EXPANSION CHAMBER FORMED THEREIN IN SPACED RELATION TO SAID FIRST NAMED CHAMBER, AND A DUCT FORMED IN SAID BASE SECTION AND IN COMMUNICATION WITH EACH OF SAID CHAMBERS, AND AN ELECTRIC HEATING MEANS POSITIONED IN SAID FIRST NAMED CHAMBER AND ADAPTED TO BE IMMERSED IN SAID LIQUID, AND A SOURCE OF ELECTRICAL ENERGY ELECTRICALLY CONNECTED TO SAID ELECTRIC HEATING MEANS.
Claim 2
Dependent Claim
104 words
AN ELECTRIC LIQUID HEATER, INCLUDING IN COMBINATION, A METALLIC RADIATOR HAVING A HEAT RADIATING PANEL SECTION AND A BASE SECTION EXTENDING FROM AN END THEREOF, SAID BASE SECTION HAVING A CLOSED CHAMBER THEREIN ADAPTED TO CONTAIN A LIQUID AND SAID BASE SECTION HAVING AN EXPANSION CHAMBER FORMED THEREIN IN SPACED RELATION TO SAID FIRST NAMED CHAMBER, AND A DUCT FORMED IN SAID BASE SECTION AND IN COMMUNICATION WITH EACH OF SAID CHAMBERS, AND AN ELECTRIC HEATING MEANS POSITIONED IN SAID FIRST NAMED CHAMBER AND ADAPTED TO BE IMMERSED IN SAID LIQUID, AND A SOURCE OF ELECTRICAL ENERGY ELECTRICALLY CONNECTED TO SAID ELECTRIC HEATING MEANS.
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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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |