US5538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spakk-arbestek
Assignee: —
•
Filing: —
•
Granted: 1848-04-25
•
Expires: 1865-04-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:50
CPC Classifications
B; B01; B01D; B01D50/00; B01D50/20; Y; Y10; Y10S; Y10S55/00; Y10S55/20
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) | 1851-04-25 | 1851-10-25 | 1852-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1855-04-25 | 1855-10-25 | 1856-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1859-04-25 | 1859-10-25 | 1860-04-25 | $7700.00 | Window Closed / Lapsed |