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Patent US3484645A successfully refreshed from Google Patents.
US3484645A
Expired / Lapsed
US
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Non-intercepting grid structure for an electron tube
Assignee: United States Department of the Army
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Filing: 1967-03-06
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Granted: 1969-12-16
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Expires: 1987-03-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Drees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:00
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/38; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0015; H01J2893/0019; H01J2893/0022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1991174A
Cited
US2750524A
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US2963605A
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US3089050A
Cited
DE1159570B
Cited
US3255374A
Cited
FR1334522A
Cited
US3334263A
Cited
US3377492A
Cited
US3297902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |