US693638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for removing noxious impurities from the air of rooms.
Assignee: Individual
•
Filing: 1900-11-20
•
Granted: 1902-02-18
•
Expires: 1920-11-20
Abstract
No abstract record available.
Inventors
- 👤 Carl Breuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:22
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; Y; Y10; Y10S; Y10S55/00; Y10S55/29
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) | 1905-02-17 | 1905-08-19 | 1906-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-02-17 | 1909-08-19 | 1910-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-02-17 | 1913-08-19 | 1914-02-18 | $7700.00 | Window Closed / Lapsed |