Patent US4943940A successfully refreshed from Google Patents.
US301192A
Expired / Lapsed
US
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Carbon for incandescent electric light
Assignee: —
•
Filing: —
•
Granted: 1884-07-01
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Expires: 1901-07-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:12
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; D; D01; D01F; D01F11/00; D01F11/10; D01F11/14; 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) | 1887-07-01 | 1887-12-31 | 1888-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1891-07-01 | 1891-12-31 | 1892-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1895-07-01 | 1895-12-31 | 1896-07-01 | $7700.00 | Window Closed / Lapsed |