US1988459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminous discharge tube system
Assignee: VOLTARC TUBES Inc
•
Filing: 1932-02-15
•
Granted: 1935-01-22
•
Expires: 1952-02-15
Abstract
No abstract record available.
Inventors
- 👤 Pennybacker Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:30
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)
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) | 1938-01-21 | 1938-07-23 | 1939-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-21 | 1942-07-23 | 1943-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-21 | 1946-07-23 | 1947-01-22 | $7700.00 | Window Closed / Lapsed |