Patent US225710A successfully refreshed from Google Patents.
US225710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirometer
Assignee: —
•
Filing: —
•
Granted: 1880-03-23
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Expires: 1897-03-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:59
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/08; A61B5/091; A61B5/093
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) | 1883-03-23 | 1883-09-22 | 1884-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1887-03-23 | 1887-09-22 | 1888-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1891-03-23 | 1891-09-22 | 1892-03-23 | $7700.00 | Window Closed / Lapsed |