US921365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifier.
Assignee: Individual
•
Filing: 1908-06-05
•
Granted: 1909-05-11
•
Expires: 1928-06-05
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Clarkson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:00
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1278; C02F3/1294; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/232
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) | 1912-05-10 | 1912-11-09 | 1913-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-05-10 | 1916-11-09 | 1917-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-05-10 | 1920-11-09 | 1921-05-11 | $7700.00 | Window Closed / Lapsed |