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Patent US181790A successfully refreshed from Google Patents.
US181790A
Expired / Lapsed
US
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Improvement in marble-cleaning compositions
Assignee: —
•
Filing: —
•
Granted: 1876-09-05
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Expires: 1893-09-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:27
CPC Classifications
C; C23; C23G; C23G1/00; C11; C11D; C11D3/00; C11D3/0005; C11D3/0078
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) | 1879-09-05 | 1880-03-06 | 1880-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1883-09-05 | 1884-03-06 | 1884-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1887-09-05 | 1888-03-06 | 1888-09-05 | $7700.00 | Window Closed / Lapsed |