US2721953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: Individual
•
Filing: 1950-10-02
•
Granted: 1955-10-25
•
Expires: 1970-10-02
Abstract
No abstract record available.
Inventors
- 👤 Rothstein Jerome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:23
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J25/00; H01J25/005; H01J25/34; H01J25/36; H01J25/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2228327A
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US2064469A
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US2300052A
Cited
US2575383A
Cited
US2541843A
Cited
US2557961A
Cited
US2643297A
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US2584597A
Cited
US2636148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |