US616276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminant for incandescent electric lamps and process of making
Assignee: —
•
Filing: —
•
Granted: 1898-12-20
•
Expires: 1915-12-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:43
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/14; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/294; Y10T428/2958
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) | 1901-12-20 | 1902-06-21 | 1902-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1905-12-20 | 1906-06-21 | 1906-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1909-12-20 | 1910-06-21 | 1910-12-21 | $7700.00 | Window Closed / Lapsed |