US3254884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient helix mount for traveling wave tube
Assignee: GTE Sylvania Inc
•
Filing: 1965-06-30
•
Granted: 1966-06-07
•
Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 James A Long
- 👤 Marshall B Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:19
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1512362A
Cited
US1811012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |