Patent US2871192A successfully refreshed from Google Patents.
US2871192A
Expired / Lapsed
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Quartz crystal
Assignee: Clevite Corp
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Filing: 1955-03-03
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Granted: 1959-01-27
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Expires: 1975-03-03
Abstract
No abstract record available.
Inventors
- 👤 Augustine Frank
- 👤 Arthur D Schwope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:49
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/02007; H03H9/02015; H03H9/02023
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
A QUARTZ CRYSTAL PLATE CONTAINING IN SOLID SOLUTION BETWEEN ABOUT 0.05 AND ABOUT 1.0 PERCENT BY WEIGHT OF GERMANIUM DIOXIDE, THE NORMAL TO THE MAJOR SURFACES OF SAID PLATE LYING APPROXIMATELY IN A CRYSTALLOGRAPHIC YZFIF-01 PLANE OF THE CRYSTALLINE MATERIAL AND MAKING AN ANGLE OF BETWEEN 34* AND 36* 30'' WITH THE CRYSTALLOGRAPHIC Y-AXIS.
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) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |