Patent US442529A successfully refreshed from Google Patents.
US442529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Half to charles a
Assignee: —
•
Filing: —
•
Granted: 1890-12-09
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Expires: 1907-12-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:10
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/08; F24D19/082; F24D19/083; F24D19/085; F24D19/087; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436; Y10T137/7722; Y10T137/7837; Y10T137/7897
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) | 1893-12-08 | 1894-06-09 | 1894-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-12-08 | 1898-06-09 | 1898-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-12-09 | 1902-06-10 | 1902-12-10 | $7700.00 | Window Closed / Lapsed |