Patent US222473A successfully refreshed from Google Patents.
US222473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in refrigerators
Assignee: —
•
Filing: —
•
Granted: 1879-12-09
•
Expires: 1896-12-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:50
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/02; F25D3/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1882-12-08 | 1883-06-09 | 1883-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1886-12-08 | 1887-06-09 | 1887-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1890-12-08 | 1891-06-09 | 1891-12-09 | $7700.00 | Window Closed / Lapsed |