US2797348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grid system for gaseous discharge device
Assignee: Chatham Electronics Corp
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Filing: 1956-05-17
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Granted: 1957-06-25
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Expires: 1976-05-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Ward W Watrous
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:09
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/50; H01J17/52; H01J17/54; H01J17/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |