US3124772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Milliamperes
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
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Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:53
CPC Classifications
H; H10; H10P; H10P95/00; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/48; C04B35/50; C04B35/51; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H10D; H10D99/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
A CONTINUOUS SEMICONDUCTIVE PATH COMPRISED OF BREAKDOWN PRODUCTS HAVING A RELATIVELY HIGH NEGATIVE TEMPERATURE COEFFICIENT OF RESISTANCE, SAID PATH BEING IMBEDDED IN A NORMALLY INSULATING MATERIAL FROM WHICH SAID BREAKDOWN PRODUCTS WERE FORMED AND HAVING ENDS TERMINATING AT OPPOSED POINTS ON SUBSTANTIALLY PARALLEL SURFACES OF SAID MATERIAL, SAID SURFACES HAVING CONDUCTIVE COATINGS IN COMMUNICATION WITH THE ENDS OF SAID PATH, SAID PATH HAVING A NEGATIVE RESISTANCE CHARACTERISTIC WHEN VOLTAGES ABOVE A CRITICAL VALUE ARE IMPRESSED ACROSS SAID CONDUCTIVE COATINGS.
References Cited (Backward Citations)
US2875506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |