Patent US2777949A successfully refreshed from Google Patents.
US2777949A
Expired / Lapsed
US
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Crystal diode for microwaves
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1953-03-03
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Granted: 1957-01-15
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Expires: 1973-03-03
Abstract
No abstract record available.
Inventors
- 👤 Haard Hans Bertil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:07
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/20; H10D64/23; H10D48/00; H10D48/30; H10D62/00; H10D62/10; H10D99/00; H10W; H10W72/00; H10W76/00; H10W76/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2142159A
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US1027238A
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US1622459A
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US2472938A
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US2469569A
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US2552052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |