US217911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in boiler-tube cleaners
Assignee: —
•
Filing: —
•
Granted: 1879-07-29
•
Expires: 1896-07-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:58
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/043; B08B9/0436
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) | 1882-07-28 | 1883-01-27 | 1883-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1886-07-28 | 1887-01-27 | 1887-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1890-07-28 | 1891-01-27 | 1891-07-29 | $7700.00 | Window Closed / Lapsed |