Patent US4622669A successfully refreshed from Google Patents.
Patent US3089856A successfully refreshed from Google Patents.
US3089856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of conductive zinc oxide
Assignee: New Jersey Zinc Co
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Filing: 1960-11-10
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Granted: 1963-05-14
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Expires: 1980-11-10
Abstract
No abstract record available.
Inventors
- 👤 Howard M Cyr
- 👤 Nicholas S Nanovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:14
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/04; C09C1/043; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; C01; C01P; C01P2006/00; C01P2006/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN THE METHOD OF PRODUCING ELECTRICALLY CONDUCTIVE ZINC OXIDE WHEREIN AN ACTIVATING AGENT COMPRISING ALUMINUM CHLORIDE IS ADDED TO NORMALLY NON-CONDUCTIVE ZINC OXIDE AND THE ACTIVATOR-CONTAINING OXIDE IS HEATED IN A REDUCING ATMOSPHERE TO A TEMPERATURE OF AT LEAST ABOUT 800*C. WITH RESULTING INCREASE IN ITS CONDUCTIVITY THE IMPROVEMENT WHICH COMPRISES FIRST HEATING THE ACTIVATORCONTAINING NON-CONDUCTIVE ZINC OXIDE IN THE AMBIENT ATMOSPHERE TO A TEMPERATURE OF AT LEAST ABOUT 650*C., SUBJECTING THIS AIR-HEATED OXIDE TO MECHANICAL DISINTEGRATION WHEREIN ANY AGGLOMERATES ARE BROKEN, AND THEREAFTER SUBJECTING THE DISINTEGRATED OXIDE TO THE AFOREMENTIONED HEAT TREATMENT IN THE REDUCING ATMOSPHERE.
Claim 2
Dependent Claim
97 words
IN THE METHOD OF PRODUCING ELECTRICALLY CONDUCTIVE ZINC OXIDE WHEREIN AN ACTIVATING AGENT COMPRISING ALUMINUM CHLORIDE IS ADDED TO NORMALLY NON-CONDUCTIVE ZINC OXIDE AND THE ACTIVATOR-CONTAINING OXIDE IS HEATED IN A REDUCING ATMOSPHERE TO A TEMPERATURE OF AT LEAST ABOUT 800*C. WITH RESULTING INCREASE IN ITS CONDUCTIVITY THE IMPROVEMENT WHICH COMPRISES FIRST HEATING THE ACTIVATORCONTAINING NON-CONDUCTIVE ZINC OXIDE IN THE AMBIENT ATMOSPHERE TO A TEMPERATURE OF AT LEAST ABOUT 650*C., SUBJECTING THIS AIR-HEATED OXIDE TO MECHANICAL DISINTEGRATION WHEREIN ANY AGGLOMERATES ARE BROKEN, AND THEREAFTER SUBJECTING THE DISINTEGRATED OXIDE TO THE AFOREMENTIONED HEAT TREATMENT IN THE REDUCING ATMOSPHERE.
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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |