US2660696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal contact device
Assignee: Hazeltine Research Inc
•
Filing: 1950-05-10
•
Granted: 1953-11-24
•
Expires: 1970-05-10
Abstract
No abstract record available.
Inventors
- 👤 James Emrys Gwynne
- 👤 Lindell Aubrey Oscar Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:49
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10D; H10D99/00; H10W72/00; H10W76/00; H10W76/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2338036A
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US2430028A
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US2434286A
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US2540490A
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US2606960A
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US2561109A
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US2561123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |