US2428661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge device of the gas filled type
Assignee: General Electric Co
•
Filing: 1943-04-17
•
Granted: 1947-10-07
•
Expires: 1963-04-17
Abstract
No abstract record available.
Inventors
- 👤 Stanley R Fitzmorris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:38
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/36; H01J17/00; H01J17/50; H01J17/52; H01J17/54
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2137198A
Cited
US1716931A
Cited
US1962159A
Cited
US1962158A
Cited
US1893887A
Cited
US2121600A
Cited
US2192162A
Cited
US2284405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |