Patent US803618A successfully refreshed from Google Patents.
US803618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-closing fireproof door.
Assignee: Individual
•
Filing: 1905-03-15
•
Granted: 1905-11-07
•
Expires: 1925-03-15
Abstract
No abstract record available.
Inventors
- 👤 Richard Davis Mumford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:21
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/002; E05F1/006; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; E05Y2900/134
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) | 1908-11-06 | 1909-05-08 | 1909-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-11-06 | 1913-05-08 | 1913-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-11-06 | 1917-05-08 | 1917-11-07 | $7700.00 | Window Closed / Lapsed |