US2673308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-voltage cold cathode discharge device
Assignee: Individual
•
Filing: 1952-01-10
•
Granted: 1954-03-23
•
Expires: 1972-01-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert A Herring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:26
CPC Classifications
H; H01; H01J; H01J13/00; H01J13/02; H01J13/34; H01J17/00; H01J17/38; H01J17/40; H01J17/44; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0068; H01J2893/0072; H01J2893/0073; H01J2893/0074; H01J2893/0087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2263958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |