Patent US6446074B1 successfully refreshed from Google Patents.
US31906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in varnishing photographs on paper
Assignee: —
•
Filing: —
•
Granted: 1861-04-02
•
Expires: 1878-04-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:10
CPC Classifications
G; G03; G03C; G03C11/00; G03C11/08; C; C09; C09D; C09D5/00; B; B44; B44D; B44D7/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1864-04-01 | 1864-10-01 | 1865-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1868-04-01 | 1868-10-01 | 1869-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1872-04-01 | 1872-10-01 | 1873-04-02 | $7700.00 | Window Closed / Lapsed |