US2664502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrahigh-frequency mixer
Assignee: Individual
•
Filing: 1945-06-23
•
Granted: 1953-12-29
•
Expires: 1965-06-23
Abstract
No abstract record available.
Inventors
- 👤 Roberts Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:55
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0616
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2413186A
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US2436830A
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US2427087A
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US2427107A
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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) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |