US3363133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge device having polycrystalline alumina end caps
Assignee: GTE Sylvania Inc
•
Filing: 1966-02-28
•
Granted: 1968-01-09
•
Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Harris
- 👤 Frederick A Loughridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:41
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/36; H01J61/366
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB431450A
Cited
US2353668A
Cited
US2971110A
Cited
US3132279A
Cited
FR1351331A
Cited
US3315116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |