US159142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in aerating and cooling apparatus
Assignee: —
•
Filing: —
•
Granted: 1875-01-26
•
Expires: 1892-01-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:43
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/312; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87619; Y10T137/87627
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) | 1878-01-25 | 1878-07-27 | 1879-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1882-01-25 | 1882-07-27 | 1883-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1886-01-25 | 1886-07-27 | 1887-01-26 | $7700.00 | Window Closed / Lapsed |