US2877338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of adjusting the operating frequency of sealed piezoelectric crystals
Assignee: JAMES KNIGHTS Co
•
Filing: 1954-10-22
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Granted: 1959-03-10
•
Expires: 1974-10-22
Abstract
No abstract record available.
Inventors
- 👤 Robert E Berge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:05
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; H03H3/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1616010A
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US2217448A
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US2479286A
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US2505370A
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US2677071A
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US2702274A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |