US2200745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: Siemens APP und Maschinen GmbH
•
Filing: 1937-10-15
•
Granted: 1940-05-14
•
Expires: 1957-10-15
Abstract
No abstract record available.
Inventors
- 👤 Heymann Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:14
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/78
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1943-05-14 | 1943-11-13 | 1944-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-14 | 1947-11-13 | 1948-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-14 | 1951-11-13 | 1952-05-14 | $7700.00 | Window Closed / Lapsed |