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US2121333A
Expired / Lapsed
US
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Gaseous conduction device
Assignee: FED ELECTRIC Co Inc
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Filing: 1934-06-23
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Granted: 1938-06-21
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Expires: 1954-06-23
Abstract
No abstract record available.
Inventors
- 👤 Robert E Barclay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:19
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/10; H01J61/103
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) | 1941-06-20 | 1941-12-20 | 1942-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-20 | 1945-12-20 | 1946-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-20 | 1949-12-20 | 1950-06-21 | $7700.00 | Window Closed / Lapsed |