Patent US668562A successfully refreshed from Google Patents.
US668562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of fire-resisting materials.
Assignee: Individual
•
Filing: 1899-12-07
•
Granted: 1901-02-19
•
Expires: 1919-12-07
Abstract
No abstract record available.
Inventors
- 👤 Alexander Imschenetzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:10
CPC Classifications
B; B31; B31C; B31C1/00; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60
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) | 1904-02-19 | 1904-08-20 | 1905-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-02-19 | 1908-08-20 | 1909-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-02-19 | 1912-08-20 | 1913-02-19 | $7700.00 | Window Closed / Lapsed |