US2642486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical crystal unit
Assignee: GTE Sylvania Inc
•
Filing: 1948-08-25
•
Granted: 1953-06-16
•
Expires: 1968-08-25
Abstract
No abstract record available.
Inventors
- 👤 Charles J Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:18
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/10; H10W76/12; H10W76/161; H10W72/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US756676A
Cited
US1741319A
Cited
US2145542A
Cited
US2360701A
Cited
US2438110A
Cited
US2414137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |