Patent US90754A successfully refreshed from Google Patents.
US90754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved compound for cleaning stone
Assignee: —
•
Filing: —
•
Granted: 1869-06-01
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Expires: 1886-06-01
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; C11; C11D; C11D7/00; C11D7/22; C11D7/26; C11D7/265; C11D7/02; C11D7/04; C11D7/10; C11D7/12; C11D7/20; C11D7/261; C11D2111/00; C11D2111/10; C11D2111/14; C11D2111/24
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) | 1872-05-31 | 1872-11-30 | 1873-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1876-05-31 | 1876-11-30 | 1877-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1880-05-31 | 1880-11-30 | 1881-06-01 | $7700.00 | Window Closed / Lapsed |