US2425697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-temperature luminescent lamp
Assignee: GEN LUMINESCENT CORP
•
Filing: 1944-03-02
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Granted: 1947-08-12
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Expires: 1964-03-02
Abstract
No abstract record available.
Inventors
- 👤 Rudolph C Hultgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:54
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/025; H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/18; H01J61/20; H01J61/30; H01J61/33
Claims Analysis
Total Claims: 0
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US2321178A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |