US2517977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic test apparatus for piezoelectric crystals
Assignee: COLONIAL RADIO Corp
•
Filing: 1947-01-22
•
Granted: 1950-08-08
•
Expires: 1967-01-22
Abstract
No abstract record available.
Inventors
- 👤 Dana W Cole
- 👤 Roy A Gull
- 👤 John C Pontius
- 👤 John P Rug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:44
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |