US2768320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave gas tubes
Assignee: GTE Sylvania Inc
•
Filing: 1951-05-15
•
Granted: 1956-10-23
•
Expires: 1971-05-15
Abstract
No abstract record available.
Inventors
- 👤 Hagan Richard Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:23
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US682694A
Cited
US1363636A
Cited
US2039167A
Cited
US2419903A
Cited
US2491971A
Cited
US2433813A
Cited
US2524268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |