US28212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensating spring-balance
Assignee: —
•
Filing: —
•
Granted: 1860-05-08
•
Expires: 1877-05-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:01
CPC Classifications
G; G01; G01G; G01G3/00; G01G3/08; Y; Y10; Y10S; Y10S524/00; Y10S524/91
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) | 1863-05-08 | 1863-11-07 | 1864-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1867-05-08 | 1867-11-07 | 1868-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1871-05-08 | 1871-11-07 | 1872-05-08 | $7700.00 | Window Closed / Lapsed |