Patent US157343A successfully refreshed from Google Patents.
US157343A
Expired / Lapsed
US
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Improvement in dilators for medical purposes
Assignee: —
•
Filing: —
•
Granted: 1874-12-01
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Expires: 1891-12-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:17
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/95; A61F2/958; A61M; A61M29/00; A61M29/02
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) | 1877-11-30 | 1878-06-01 | 1878-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1881-11-30 | 1882-06-01 | 1882-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1885-11-30 | 1886-06-01 | 1886-12-01 | $7700.00 | Window Closed / Lapsed |