Patent US2679568A successfully refreshed from Google Patents.
US2679568A
Expired / Lapsed
US
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Ceramic contact resistor composition
Assignee: Motors Liquidation Co
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Filing: 1950-11-07
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Granted: 1954-05-25
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Expires: 1970-11-07
Abstract
No abstract record available.
Inventors
- 👤 Robert W Smith
- 👤 Schwartzwalder Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:15
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/14; H01C1/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A MONOLITHIC CERAMIC RESISTOR UNIT COMPRISING A RESISTOR PORTION OF A GLASS-BONDED RESISTANCE MATERIAL AND A TERMINAL PORTION OF POWDERED MATERIAL BONDED BY A GLASS PHASE INLCUDING A BOROSILICATE GLASS AND ALKALINE EARTH BORATE GLASS, SAID POWDERED MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF NICKEL, COPPER, SILVER, NICHROME AND IRON.
Claim 2
Dependent Claim
51 words
A MONOLITHIC CERAMIC RESISTOR UNIT COMPRISING A RESISTOR PORTION OF A GLASS-BONDED RESISTANCE MATERIAL AND A TERMINAL PORTION OF POWDERED MATERIAL BONDED BY A GLASS PHASE INLCUDING A BOROSILICATE GLASS AND ALKALINE EARTH BORATE GLASS, SAID POWDERED MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF NICKEL, COPPER, SILVER, NICHROME AND IRON.
References Cited (Backward Citations)
DE314173C
Cited
US1922221A
Cited
US2106249A
Cited
US2106578A
Cited
US2248415A
Cited
US2267571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |