Patent US3362078A successfully refreshed from Google Patents.
Patent US2305844A successfully refreshed from Google Patents.
US2305844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: International Standard Electric Corp
•
Filing: 1941-04-11
•
Granted: 1942-12-22
•
Expires: 1961-04-11
Abstract
No abstract record available.
Inventors
- 👤 Trevor H Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:08
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12; Y; Y10; Y10S; Y10S29/00; Y10S29/035; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/49908; Y10T29/49938
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) | 1945-12-21 | 1946-06-22 | 1946-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-21 | 1950-06-22 | 1950-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-21 | 1954-06-22 | 1954-12-22 | $7700.00 | Window Closed / Lapsed |