US3142811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistor
Assignee: Verizon Laboratories Inc
•
Filing: 1961-11-29
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Granted: 1964-07-28
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Expires: 1981-11-29
Abstract
No abstract record available.
Inventors
- 👤 James A O'connell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:59
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
THE METHOD OF MAKING A NON-LINEAR RESISTOR COMPRISING THE STEPS OF HEATING TIN PROTOXIDE IN AIR TO A TEMPERATURE BETWEEN 200*C. AND 400*C. FOR ABOUT 40 MINUTES, ADMIXING SAID TIN PROTOXIDE POWDER WITH ACETONE, SETTLING THE RESULTING SOLUTION OVER AN ELECTRODED SUBSTRATE AND ALLOWING SAID SOLUTION TO EVAPORATE, AND DEPOSITING AN ELECTRODE OVER THE TOP SURFACE OF THE RESULTING NON-LINEAR RESISTIVE LAYER.
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |