US242900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacturing carbons for electric lamps
Assignee: —
•
Filing: —
•
Granted: 1881-06-14
•
Expires: 1898-06-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:15
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/15; C01B32/158; C01B32/16; C01B32/162; Y; Y10; Y10T; Y10T29/00; Y10T29/30; Y10T29/301; Y10T29/308; Y10T29/49; Y10T29/4998; Y10T29/49982
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) | 1884-06-13 | 1884-12-13 | 1885-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1888-06-13 | 1888-12-13 | 1889-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1892-06-13 | 1892-12-13 | 1893-06-14 | $7700.00 | Window Closed / Lapsed |