Patent US690409A successfully refreshed from Google Patents.
US690409A
Expired / Lapsed
US
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Carbonometer.
Assignee: CLARENCE S MCLEAN
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Filing: 1900-12-24
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Granted: 1902-01-07
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Expires: 1920-12-24
Abstract
No abstract record available.
Inventors
- 👤 Edgar S Downs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:56
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/56; G01N25/62
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) | 1905-01-06 | 1905-07-08 | 1906-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-01-06 | 1909-07-08 | 1910-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-01-06 | 1913-07-08 | 1914-01-07 | $7700.00 | Window Closed / Lapsed |