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US36808A
Expired / Lapsed
US
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Improvement in shields for surface-condensers
Assignee: —
•
Filing: —
•
Granted: 1862-10-28
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Expires: 1879-10-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:04
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0206; F28D1/022
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) | 1865-10-27 | 1866-04-28 | 1866-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1869-10-27 | 1870-04-28 | 1870-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1873-10-27 | 1874-04-28 | 1874-10-28 | $7700.00 | Window Closed / Lapsed |