Patent US4470818A successfully refreshed from Google Patents.
US3471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isaac b
Assignee: —
•
Filing: —
•
Granted: 1844-03-09
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Expires: 1861-03-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:12
CPC Classifications
A; A44; A44B; A44B11/00; A44B11/02; A44B11/06; A44B11/12; Y; Y10; Y10T; Y10T24/00; Y10T24/40; Y10T24/4002; Y10T24/4012; Y10T24/4016; Y10T24/4072; Y10T24/4077
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) | 1847-03-09 | 1847-09-08 | 1848-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1851-03-09 | 1851-09-08 | 1852-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1855-03-09 | 1855-09-08 | 1856-03-09 | $7700.00 | Window Closed / Lapsed |