US6571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in windmills
Assignee: —
•
Filing: —
•
Granted: 1849-07-03
•
Expires: 1866-07-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:40
CPC Classifications
F; F03; F03D; F03D1/00; F03D1/06; F03D1/0608; F03D1/0633; F05; F05B; F05B2260/00; F05B2260/70; F05B2260/72; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/74
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) | 1852-07-02 | 1853-01-01 | 1853-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1856-07-02 | 1857-01-01 | 1857-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1860-07-02 | 1861-01-01 | 1861-07-03 | $7700.00 | Window Closed / Lapsed |