Patent US42049A successfully refreshed from Google Patents.
US42049A
Expired / Lapsed
US
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Improvement in dampers
Assignee: —
•
Filing: —
•
Granted: 1864-03-22
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Expires: 1881-03-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:35
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/001; Y; Y10; Y10S; Y10S165/00; Y10S165/092; Y10S165/109; Y10S165/11; Y10S165/113; Y10S165/115
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) | 1867-03-22 | 1867-09-21 | 1868-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1871-03-22 | 1871-09-21 | 1872-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1875-03-22 | 1875-09-21 | 1876-03-22 | $7700.00 | Window Closed / Lapsed |