US3022443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folded transmission line and tube
Assignee: University of Illinois at Urbana-Champaign
•
Filing: 1955-05-09
•
Granted: 1962-02-20
•
Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 Vernon J Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:14
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2398608A
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US2396708A
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US2462410A
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US2503955A
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US2439512A
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US2458577A
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US2639312A
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US2589397A
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US2813221A
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US2723302A
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US2695372A
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US2896117A
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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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |