US2898243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of changing the resonant frequency of a quartz crystal
Assignee: Individual
•
Filing: 1958-03-14
•
Granted: 1959-08-04
•
Expires: 1978-03-14
Abstract
No abstract record available.
Inventors
- 👤 Henry E Wenden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:15
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; H03H3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE METHOD OF ADJUSTING THE RESONANT FREQUENCY OF A QUARTZ CRYSTAL COMPRISING PLACING SAID CRYSTAL IN CONTACT WITH A COMPOUND SELECTED FORM THE GROUP CONSISTING OF THE INORGANIC SALTS AND OXIDES OF BERYLLIUM, MAGNESIUM, CALCIUM, STRONTIUM, BARIUM, LITHIUM, SODIUM AND CESIUM, MAINTAINING SAID CRYSTAL AND SAID COMPOUND AT A PREDETERMINED TEMPERATURE, AND APPLYING A DIRECT CURRENT POTENTIAL ACROSS SAID CRYLSTA AND SAID COMPOUND FOR A PREDETERMINED PERIOD OF TIME.
Claim 2
Independent Claim
69 words
THE METHOD OF ADJUSTING THE RESONANT FREQUENCY OF A QUARTZ CRYSTAL COMPRISING PLACING SAID CRYSTAL IN CONTACT WITH A COMPOUND SELECTED FORM THE GROUP CONSISTING OF THE INORGANIC SALTS AND OXIDES OF BERYLLIUM, MAGNESIUM, CALCIUM, STRONTIUM, BARIUM, LITHIUM, SODIUM AND CESIUM, MAINTAINING SAID CRYSTAL AND SAID COMPOUND AT A PREDETERMINED TEMPERATURE, AND APPLYING A DIRECT CURRENT POTENTIAL ACROSS SAID CRYLSTA AND SAID COMPOUND FOR A PREDETERMINED PERIOD OF TIME.
References Cited (Backward Citations)
US2106143A
Cited
US2486968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |