US2515820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminous display unit
Assignee: Individual
•
Filing: 1945-10-15
•
Granted: 1950-07-18
•
Expires: 1965-10-15
Abstract
No abstract record available.
Inventors
- 👤 George P R Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:34
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/18; H01H9/185
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US296431A
Cited
US527744A
Cited
US737124A
Cited
US899873A
Cited
US953053A
Cited
US1202589A
Cited
US1220418A
Cited
US1522169A
Cited
US1385300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |