US2593429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas filled electric discharge device
Assignee: International Standard Electric Corp
•
Filing: 1947-08-07
•
Granted: 1952-04-22
•
Expires: 1967-08-07
Abstract
No abstract record available.
Inventors
- 👤 Foulkes Christopher Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:38
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J2893/00; H01J2893/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2212921A
Cited
US1945693A
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US2019770A
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US2404920A
Cited
US2432608A
Cited
US2331398A
Cited
US2419485A
Cited
US2397661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |