Patent US176931A successfully refreshed from Google Patents.
US176931A
Expired / Lapsed
US
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Improvement in air-compressing apparatus
Assignee: —
•
Filing: —
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Granted: 1876-05-02
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Expires: 1893-05-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:46
CPC Classifications
F; F04; F04B; F04B23/00; F04B23/04; F04B23/08; F04B23/14; F04B23/10; F04B23/106
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) | 1879-05-02 | 1879-11-01 | 1880-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1883-05-02 | 1883-11-01 | 1884-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1887-05-02 | 1887-11-01 | 1888-05-02 | $7700.00 | Window Closed / Lapsed |