US2433218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold cathode fluorescent lamp
Assignee: Individual
•
Filing: 1945-06-12
•
Granted: 1947-12-23
•
Expires: 1965-06-12
Abstract
No abstract record available.
Inventors
- 👤 Herzog Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:47
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/067; H01J61/0672; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/066; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0066
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1999735A
Cited
US2008066A
Cited
US2146579A
Cited
US2117054A
Cited
US2156068A
Cited
US2271657A
Cited
US2267318A
Cited
US2238277A
Cited
US2317265A
Cited
US2331306A
Cited
US2404057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-22 | 1951-06-23 | 1951-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-22 | 1955-06-23 | 1955-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-22 | 1959-06-23 | 1959-12-23 | $7700.00 | Window Closed / Lapsed |