Patent US4520817A successfully refreshed from Google Patents.
US2375223A
Expired / Lapsed
US
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Dielectric guide signaling
Assignee: Leland Stanford Junior University
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Filing: 1939-08-24
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Granted: 1945-05-08
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Expires: 1959-08-24
Abstract
No abstract record available.
Inventors
- 👤 William W Hansen
- 👤 Russell H Varian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:04
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/10; H; H01; H01P; H01P1/00; H01P1/16; H01P1/161; H01P5/00; H01P5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-05-07 | 1948-11-06 | 1949-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-05-07 | 1952-11-06 | 1953-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-05-07 | 1956-11-06 | 1957-05-08 | $7700.00 | Window Closed / Lapsed |