US2815283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel chromium alloy and electrical resistance heating elements made thereof
Assignee: Huntington Alloys Corp
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Filing: 1953-07-14
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Granted: 1957-12-03
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Expires: 1973-07-14
Abstract
No abstract record available.
Inventors
- 👤 Betteridge Walter
- 👤 Lewis Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:36
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058; H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
AN ELECTRIC RESISTANCE HEATING ELEMENT MADE OF A NICKEL-CHROMIUM ALLOY CONSISTING ESSENTIALLY OF 15% TO 25% CHROMIUM, 0.01% TO 0.03% CALCIUM, 1.4% 1.6% SILICON, 0.03% TO 0.05% CERIUM, UP TO 15% COBALT, UP TO 2% IRON, UP TO 3% MANGANESE, UP TO 1% ALUMINUM, UP TO 0.16% COPPER, UP TO 0.3% CARBON, AND THE BALANCE CONSISTING ESSENTIALLY OF NICKEL, SAID ELECTRIC RESISTANCE HEATING ELEMENT BEING CHARACTERIZED BY MARKEDLY IMPROVED SERVICE LIFE AT LEAST 400 HOURS WHEN SUBJECTED TO INTERMITTED HEATING AND COOLING AT AN ELEVATED TEMPERATURE OF 2150*F. IN ACCORDANCE WITH ASTM DESIGNATION B 76-39.
Claim 2
Dependent Claim
95 words
AN ELECTRIC RESISTANCE HEATING ELEMENT MADE OF A NICKEL-CHROMIUM ALLOY CONSISTING ESSENTIALLY OF 15% TO 25% CHROMIUM, 0.01% TO 0.03% CALCIUM, 1.4% 1.6% SILICON, 0.03% TO 0.05% CERIUM, UP TO 15% COBALT, UP TO 2% IRON, UP TO 3% MANGANESE, UP TO 1% ALUMINUM, UP TO 0.16% COPPER, UP TO 0.3% CARBON, AND THE BALANCE CONSISTING ESSENTIALLY OF NICKEL, SAID ELECTRIC RESISTANCE HEATING ELEMENT BEING CHARACTERIZED BY MARKEDLY IMPROVED SERVICE LIFE AT LEAST 400 HOURS WHEN SUBJECTED TO INTERMITTED HEATING AND COOLING AT AN ELEVATED TEMPERATURE OF 2150*F. IN ACCORDANCE WITH ASTM DESIGNATION B 76-39.
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) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |