Patent US2944027A successfully refreshed from Google Patents.
US2944027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating a synthetic quartz crystal
Assignee: Individual
•
Filing: 1956-05-07
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Granted: 1960-07-05
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Expires: 1976-05-07
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Stanley
- 👤 Theokritoff Sergius
- 👤 Eduard A Gerber
- 👤 Andrew R Chi
- 👤 Donald L Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:30
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN THE FABRICATION OF A SYNTHETIC QUARTZ CRYSTAL, THE IMPROVEMENT COMPRISING INTRODUCING ALUMINUM INTO THE SOLUTION FROM WHICH SAID QUARTZ CRYSTAL IS MADE IN AN AUTOCLAVE OPERATED IN PRESSURE RANGE FROM 5000-6000 P.S.I. AT A TEMPERATURE OF ABOUT 350*C. FOR A PERIOD OF FROM 8 TO 15 DAYS.
Claim 2
Dependent Claim
48 words
IN THE FABRICATION OF A SYNTHETIC QUARTZ CRYSTAL, THE IMPROVEMENT COMPRISING INTRODUCING ALUMINUM INTO THE SOLUTION FROM WHICH SAID QUARTZ CRYSTAL IS MADE IN AN AUTOCLAVE OPERATED IN PRESSURE RANGE FROM 5000-6000 P.S.I. AT A TEMPERATURE OF ABOUT 350*C. FOR A PERIOD OF FROM 8 TO 15 DAYS.
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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |