US2771561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quartz crystal units
Assignee: Pye Electronic Products Ltd
•
Filing: 1952-03-17
•
Granted: 1956-11-20
•
Expires: 1972-03-17
Abstract
No abstract record available.
Inventors
- 👤 Fuller Dennis Quintrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0504; H03H9/0514
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2155035A
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US2258967A
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US2306909A
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US2343059A
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US2371613A
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US2471675A
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US2409838A
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US2474241A
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US2487165A
Cited
US2472179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |