US155521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in steam-traps
Assignee: —
•
Filing: —
•
Granted: 1874-09-29
•
Expires: 1891-09-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:12
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/002; B60T17/004; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/3028; Y10T137/3031; Y10T137/304; Y10T137/3052; Y10T137/3068; Y10T137/308
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) | 1877-09-28 | 1878-03-30 | 1878-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1881-09-28 | 1882-03-30 | 1882-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1885-09-28 | 1886-03-30 | 1886-09-29 | $7700.00 | Window Closed / Lapsed |