US697679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooling apparatus.
Assignee: Individual
•
Filing: 1901-10-04
•
Granted: 1902-04-15
•
Expires: 1921-10-04
Abstract
No abstract record available.
Inventors
- 👤 Alfred Siebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:10
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F5/0017; Y; Y02; Y02E; Y02E60/00; Y02E60/14; Y10; Y10S; Y10S261/00; Y10S261/43
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) | 1905-04-14 | 1905-10-14 | 1906-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-04-14 | 1909-10-14 | 1910-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-04-14 | 1913-10-14 | 1914-04-15 | $7700.00 | Window Closed / Lapsed |