US672488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator for buildings.
Assignee: Individual
•
Filing: 1900-06-21
•
Granted: 1901-04-23
•
Expires: 1920-06-21
Abstract
No abstract record available.
Inventors
- 👤 Charley H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1426
Claims Analysis
Total Claims: 0
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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) | 1904-04-22 | 1904-10-22 | 1905-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-04-22 | 1908-10-22 | 1909-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-04-22 | 1912-10-22 | 1913-04-23 | $7700.00 | Window Closed / Lapsed |