US3671193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc oxide crystal bulk-effect oscillator and method of preparing the same
Assignee: STANLEY V JASKOLSKI
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Filing: 1970-02-11
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Granted: 1972-06-20
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Expires: 1990-02-11
Abstract
Abstract TO PROVIDE A COMMERCIAL ZINC OXIDE SINGLE CRYSTAL WITH PREDETERMINED ELECTRICAL CHARACTERISTICS IT IS CLEANED, EMBEDDED IN ZINC OXIDE POWDER, AND HEATED (E.G., FOR 1-3 HOURS AT 750*-800*C.) IN AN ATMOSPHERE HAVING A PREDETERMINED OXYGEN PARTIAL PRESSURE (E.G., ONE PART OXYGEN TO 10,000 PARTS ARGON). TEMPERATURE AND OXYGEN PARTIAL PRESSURE ARE CONTROLLED TO DETERMINE THE RESISTIVITY CHARACTERISTICS. TO SHORTEN SUCH TREATMENT THE CRYSTAL CAN BE SUBJECTED TO A PRELIMINARY HEAT TREATMENT IN AIR OR OXYGEN AT NEAR-ATMOSPHERIC PRESSURE AT ABOUT 750*C. FOR 3-18 HOURS.
Inventors
- 👤 Stanley V Jaskolski
- 👤 Martin A Seitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:30
CPC Classifications
C; C01; C01G; C01G9/00; C01G9/02; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B33/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |