US2261154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grid structure for high frequency apparatus
Assignee: Leland Stanford Junior University
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Filing: 1939-07-22
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Granted: 1941-11-04
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Expires: 1959-07-22
Abstract
No abstract record available.
Inventors
- 👤 William W Hansen
- 👤 Russell H Varian
- 👤 John R Woodyard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
H; H01; H01J; H01J19/00; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019; H01J2893/0022; H01J2893/0024
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) | 1944-11-03 | 1945-05-05 | 1945-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-11-03 | 1949-05-05 | 1949-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-11-03 | 1953-05-05 | 1953-11-04 | $7700.00 | Window Closed / Lapsed |