US173215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in rotary pumps
Assignee: —
•
Filing: —
•
Granted: 1876-02-08
•
Expires: 1893-02-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:37
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1238
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) | 1879-02-07 | 1879-08-09 | 1880-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1883-02-07 | 1883-08-09 | 1884-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1887-02-07 | 1887-08-09 | 1888-02-08 | $7700.00 | Window Closed / Lapsed |