US3673117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistant material
Assignee: Methode Development Co
•
Filing: 1969-12-19
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Granted: 1972-06-27
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Expires: 1989-12-19
Abstract
Abstract Electrical resistance elements are formed using minute amounts of noble metal oxide hydrate in a vitreous binder with or without the inclusion of high electrical resistance metals or their oxides to adjust the ohmic value of the elements.
Inventors
- 👤 Duane Arthur Schroeder
- 👤 Alvin Dennis Weiss
- 👤 Benedict Clare Giltner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:51
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06533; H01C17/0654
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
50 words
The resistance forming material of claim 1 further containing between 0.01 and 25 percent by weight of at least one high resistance metal selected from the group consisting of cobalt, chromium, manganese, antimony, barium, bismuth, cadmium, cerium, calcium, lead, magnesium, silicon, strontium, tantalum, tin, tungsten, zinc, lanthanum, uranium and nickel.
Claim 2
Dependent Claim
23 words
The resistance forming material of claim 1 which further contains from 0.01 to 25 percent by weight of nickel in finely divided form.
Claim 3
Dependent Claim
25 words
The resistance forming material of claim 3 wherein the nickel is added as the metal itself, an organo-metallic complex, an oxide or a salt thereof.
Claim 4
Dependent Claim
35 words
A resistance forming material consisting essentially of from about 0.1 to 25 percent by weight of Ru as ruthenium dioxide hydrate and from about 75-99.9 percent by weight of bismuth lead borosilicate glass forming constituents.
Claim 5
Dependent Claim
18 words
The resistance forming material of claim 5 further containing from 0.1 to 10 percent by weight of rhodium.
Claim 6
Dependent Claim
30 words
The resistance forming material of claim 6 wherein the rhodium exists as the elemental metal, as an anhydrous metal oxide or salt, as an organo-metallic complex or a hydrated oxide.
Claim 7
Dependent Claim
60 words
A resistance composition with which a base may be coated in a desired pattern and when fired produce stable resistor films having a sheet resistivity in the area of 250 ohms per square, said composition consisting essentially of powdered bismuth lead borosilicate glass forming constituents containing from about 4 to 6 percent by weight of finely divided ruthenium dioxide hydrate.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |