Patent US3227323A successfully refreshed from Google Patents.
Patent US452734A successfully refreshed from Google Patents.
US452734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grate
Assignee: —
•
Filing: —
•
Granted: 1891-05-19
•
Expires: 1908-05-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:21
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/191; F24B1/193
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) | 1894-05-18 | 1894-11-17 | 1895-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1898-05-18 | 1898-11-17 | 1899-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1902-05-19 | 1902-11-18 | 1903-05-20 | $7700.00 | Window Closed / Lapsed |