Patent US517481A successfully refreshed from Google Patents.
US517481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for producing respiration
Assignee: —
•
Filing: —
•
Granted: 1894-04-03
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Expires: 1911-04-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:47
CPC Classifications
A; A61; A61H; A61H31/00; A61H31/02
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) | 1897-04-02 | 1897-10-02 | 1898-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1901-04-03 | 1901-10-03 | 1902-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1905-04-03 | 1905-10-03 | 1906-04-04 | $7700.00 | Window Closed / Lapsed |