Patent US442846A successfully refreshed from Google Patents.
US442846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-air drum
Assignee: —
•
Filing: —
•
Granted: 1890-12-16
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Expires: 1907-12-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:08
CPC Classifications
F; F28; F28F; F28F27/00; F28F27/02; F28D; F28D21/00; F28D21/0001; F28D21/0003; Y; Y10; Y10S; Y10S165/00; Y10S165/092; Y10S165/109; Y10S165/11; Y10S165/113; Y10S165/116
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) | 1893-12-15 | 1894-06-16 | 1894-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-12-15 | 1898-06-16 | 1898-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-12-16 | 1902-06-17 | 1902-12-17 | $7700.00 | Window Closed / Lapsed |