Patent US928470A successfully refreshed from Google Patents.
US928470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold.
Assignee: DUPLEX METALS Co
•
Filing: 1908-04-30
•
Granted: 1909-07-20
•
Expires: 1928-04-30
Abstract
No abstract record available.
Inventors
- 👤 John F Monnot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:46
CPC Classifications
B; B22; B22C; B22C21/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/30
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) | 1912-07-19 | 1913-01-18 | 1913-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-07-19 | 1917-01-18 | 1917-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-07-19 | 1921-01-18 | 1921-07-20 | $7700.00 | Window Closed / Lapsed |