US2816200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical heating unit
Assignee: Huntington Alloys Corp
•
Filing: 1954-12-15
•
Granted: 1957-12-10
•
Expires: 1974-12-15
Abstract
No abstract record available.
Inventors
- 👤 Mudge William Alvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:02
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12771; Y10T428/12861; Y10T428/12937; Y10T428/12944; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T428/2949
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A NEW AND IMPROVED ELECTRICAL HEATING UNIT ADAPTED TO BE OPERATED AT RALATIVELY HIGH TEMPERATURE OF ABOUT 1600* F, TO ABOUT 2200* F. FOR LONG PERIODS OF TIME COMPRISING A HEAT REFRACTORY AND ELECTRUCALLY INSULTING MATERIAL COMPRISES ESSENTIALLY OF MAGNESIUM OXIDE AND EMCASED IN A METALLIC DHEAT COMPRISES OF A NICKEL-CHROMIMUM-IRON ALLOY, AND A BASE METAL ELECTRICAL RESISTANCE ELEMENT EMBEDDED IN SAID INSULATING MATERRIAL AND COMPRISED OF AN ALLOY CONTAINING IRON GROUP METAL AND A LEAST ONE METAL FROM THE GROUP CONSISTING OF CHROMIUM AND MOLYBDEUM, SAID RESISTANCE ELEMENT HAVING A METALLURGICALLY ALLOY-BONDED SURFACE LAYER OF NICKEL.
Claim 2
Dependent Claim
97 words
A NEW AND IMPROVED ELECTRICAL HEATING UNIT ADAPTED TO BE OPERATED AT RALATIVELY HIGH TEMPERATURE OF ABOUT 1600* F, TO ABOUT 2200* F. FOR LONG PERIODS OF TIME COMPRISING A HEAT REFRACTORY AND ELECTRUCALLY INSULTING MATERIAL COMPRISES ESSENTIALLY OF MAGNESIUM OXIDE AND EMCASED IN A METALLIC DHEAT COMPRISES OF A NICKEL-CHROMIMUM-IRON ALLOY, AND A BASE METAL ELECTRICAL RESISTANCE ELEMENT EMBEDDED IN SAID INSULATING MATERRIAL AND COMPRISED OF AN ALLOY CONTAINING IRON GROUP METAL AND A LEAST ONE METAL FROM THE GROUP CONSISTING OF CHROMIUM AND MOLYBDEUM, SAID RESISTANCE ELEMENT HAVING A METALLURGICALLY ALLOY-BONDED SURFACE LAYER OF NICKEL.
References Cited (Backward Citations)
US1367341A
Cited
US1359400A
Cited
US1478845A
Cited
US1862138A
Cited
US1869140A
Cited
US2085730A
Cited
US2432149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |