Patent US3443839A successfully refreshed from Google Patents.
US701453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon-sorting machine.
Assignee: National Carbon Co Inc
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Filing: 1902-02-15
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Granted: 1902-06-03
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Expires: 1922-02-15
Abstract
No abstract record available.
Inventors
- 👤 Mahlon M Zellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/2851; Y; Y10; Y10S; Y10S209/00; Y10S209/941
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) | 1905-06-02 | 1905-12-02 | 1906-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-06-02 | 1909-12-02 | 1910-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-06-02 | 1913-12-02 | 1914-06-03 | $7700.00 | Window Closed / Lapsed |