Patent US2257436A successfully refreshed from Google Patents.
US92941A
Expired / Lapsed
US
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Improved condenser for stills
Assignee: —
•
Filing: —
•
Granted: 1869-07-27
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Expires: 1886-07-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:43
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0231; F25; F25B; F25B39/00; F25B39/04
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) | 1872-07-26 | 1873-01-25 | 1873-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1876-07-26 | 1877-01-25 | 1877-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1880-07-26 | 1881-01-25 | 1881-07-27 | $7700.00 | Window Closed / Lapsed |