US149019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in balance slide-valves
Assignee: —
•
Filing: —
•
Granted: 1874-03-24
•
Expires: 1891-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:13
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/86702
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) | 1877-03-23 | 1877-09-22 | 1878-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1881-03-23 | 1881-09-22 | 1882-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1885-03-23 | 1885-09-22 | 1886-03-24 | $7700.00 | Window Closed / Lapsed |