US2249672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge device
Assignee: General Electric Co
•
Filing: 1937-03-15
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Granted: 1941-07-15
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Expires: 1957-03-15
Abstract
No abstract record available.
Inventors
- 👤 Hans J Spanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:28
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/12; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/066; H01J9/04; H01J9/042; H01J9/045; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0066
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) | 1944-07-14 | 1945-01-13 | 1945-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-14 | 1949-01-13 | 1949-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-14 | 1953-01-13 | 1953-07-15 | $7700.00 | Window Closed / Lapsed |