US3607245A
Expired / Lapsed
US
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Electrical resistance alloy
Assignee: Carpenter Technology Corp
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Filing: 1968-05-28
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Granted: 1971-09-21
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Expires: 1988-05-28
Abstract
Abstract An alloy primarily adapted for use as an electrical heating element which utilizes iron, nickel, chromium and silicon as major constituents together with aluminum, calcium, zirconium and one or more rare earth metals as minor constituents.
Inventors
- 👤 Arnold J Gottlieb
- 👤 C Dean Starr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:59
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/053; C22C19/058; H; H01; H01B; H01B1/00; H01B1/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
20 words
An alloy as set forth in claim 1 further including aluminum %-0.3%; calcium 0.01%-0.15%; zirconium 0.01%-0.3%; and misch metal 0.10%-1%.
Claim 2
Dependent Claim
34 words
An alloy as set forth in claim 2 wherein the percentages of the various metals are as follows: nickel 36.64%; chromium 29.86%; silicon 1.67%; aluminum 0.09%; calcium 0.02%; zirconium 0.05%; and misch metal 0.20%.
Claim 3
Dependent Claim
34 words
An alloy as set forth in claim 1 wherein the percentages of the various metals are as follows: nickel 36.41%; chromium 28.93%; silicon 1.62%; aluminum 0.06%; calcium 0.04%; zirconium 0.05%; and misch metal 0.19%.
References Cited (Backward Citations)
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US2564498A
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US2687956A
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US2815283A
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US2813788A
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |