US821655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radium surface.
Assignee: Individual
•
Filing: 1904-07-30
•
Granted: 1906-05-29
•
Expires: 1924-07-30
Abstract
No abstract record available.
Inventors
- 👤 Hugo Lieber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:46
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/04; G21G4/06; H; H01; H01J; H01J25/00
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) | 1909-05-28 | 1909-11-27 | 1910-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-05-28 | 1913-11-27 | 1914-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-05-28 | 1917-11-27 | 1918-05-29 | $7700.00 | Window Closed / Lapsed |