Patent US3668599A successfully refreshed from Google Patents.
US3668599A
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Electrical resistance element
Assignee: Kanthal AB
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Filing: 1970-09-15
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Granted: 1972-06-06
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Expires: 1990-09-15
Abstract
Abstract An electrical resistance element formed of an array of parallel MoSi2 rods coupled in series by connecting adjacent rod ends together in pairs at one end of the array and at the other end connecting adjacent rod ends together in pairs staggered with respect to those at the first end. The connection is made by means of a flame-sprayed layer of MoSiAl or MoSi2 and the array is supported by an elastic cross bar in a ceramic frame.
Inventors
- 👤 Nils Gustav Schrewelius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:19
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; H05B3/74; H05B3/748; H05B3/688
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
30 words
An electrical resistance element as claimed in claim 1, further comprising: frame means surrounding said resistance rods, said resilient cross bar connected at opposite ends thereof to said frame means.
Claim 2
Dependent Claim
57 words
An electrical resistance element as claimed in claim 2, wherein said spaced array of said rods includes a plurality of substantially straight mutually parallel element rods connected in series by having their first ends connected in pairs and their other ends connected in pairs staggered by one rod with respect to the pairs at said first ends.
Claim 3
Dependent Claim
41 words
An electrical resistance element as claimed in claim 3 wherein said resilient support means includes two spaced parallel resilient cross bars supporting all of said rods at symmetrical positions spaced from the ends of said rod, approximately one-fourth the length thereof.
Claim 4
Dependent Claim
25 words
An electrical resistance element as claimed in claim 3, wherein said electrical interconnection means comprises a flame sprayed layer of a material including molybenum disilicide.
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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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |