US223898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp
Assignee: Individual
•
Filing: 1879-11-04
•
Granted: 1880-01-27
•
Expires: 1899-11-04
Abstract
No abstract record available.
Inventors
- 👤 Thomas Alva Edison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:41
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/14; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/24; H01K1/04; H01K1/06; H01K3/00; H01K3/02; H01K3/06; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0038; H01J2893/0039; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1883-01-26 | 1883-07-28 | 1884-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1887-01-26 | 1887-07-28 | 1888-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1891-01-26 | 1891-07-28 | 1892-01-27 | $7700.00 | Window Closed / Lapsed |