Patent US2807584A successfully refreshed from Google Patents.
US2807584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material for cleaning silver
Assignee: —
•
Filing: —
•
Granted: 1957-09-24
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Expires: 1974-09-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:23
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1673958A
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US1837603A
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US1749317A
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US2075967A
Cited
US2404297A
Cited
US2495066A
Cited
US2504064A
Cited
US2491832A
Cited
US2682460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |