US2443490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parallel neon bulb circuit
Assignee: Individual
•
Filing: 1947-04-22
•
Granted: 1948-06-15
•
Expires: 1967-04-22
Abstract
No abstract record available.
Inventors
- 👤 Yates Harold Radcliffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:56
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/16; H05B41/20; H05B41/23; H05B41/232; Y; Y10; Y10S; Y10S315/00; Y10S315/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1903496A
Cited
US1990175A
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US2265323A
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US2050135A
Cited
US2010849A
Cited
US1994305A
Cited
US1992984A
Cited
US2301671A
Cited
US2413681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |