US2231999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge lamp and circuit
Assignee: Westinghouse Electric Corp
•
Filing: 1938-04-23
•
Granted: 1941-02-18
•
Expires: 1958-04-23
Abstract
No abstract record available.
Inventors
- 👤 Daniel S Gustin
- 👤 Jr Robert Fred Hays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:29
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; Y; Y10; Y10S; Y10S315/00; Y10S315/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-02-18 | 1944-08-19 | 1945-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-18 | 1948-08-19 | 1949-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-18 | 1952-08-19 | 1953-02-18 | $7700.00 | Window Closed / Lapsed |