US35672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in sweat-leather ventilators for hats
Assignee: —
•
Filing: —
•
Granted: 1862-06-24
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Expires: 1879-06-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:07
CPC Classifications
A; A42; A42C; A42C5/00; A42C5/04
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) | 1865-06-23 | 1865-12-23 | 1866-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1869-06-23 | 1869-12-23 | 1870-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1873-06-23 | 1873-12-23 | 1874-06-24 | $7700.00 | Window Closed / Lapsed |