US2461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-lithografhen
Assignee: —
•
Filing: —
•
Granted: 1842-02-21
•
Expires: 1859-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:35
CPC Classifications
B; B01; B01D; B01D50/00; B01D50/20; Y; Y10; Y10S; Y10S55/00; Y10S55/20
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) | 1845-02-20 | 1845-08-22 | 1846-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1849-02-20 | 1849-08-22 | 1850-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1853-02-20 | 1853-08-22 | 1854-02-21 | $7700.00 | Window Closed / Lapsed |