US836333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chimney closure and ventilator.
Assignee: Individual
•
Filing: 1905-06-29
•
Granted: 1906-11-20
•
Expires: 1925-06-29
Abstract
No abstract record available.
Inventors
- 👤 Jack Elias Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:43
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/02; E04H15/10; E04H15/14
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) | 1909-11-19 | 1910-05-21 | 1910-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-11-19 | 1914-05-21 | 1914-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-11-19 | 1918-05-21 | 1918-11-20 | $7700.00 | Window Closed / Lapsed |