US810451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating air.
Assignee: REGENERATED COLD AIR Co
•
Filing: 1904-08-08
•
Granted: 1906-01-23
•
Expires: 1924-08-08
Abstract
No abstract record available.
Inventors
- 👤 Frederick White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:37
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; Y; Y10; Y10S; Y10S261/00; Y10S261/03; 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) | 1909-01-22 | 1909-07-24 | 1910-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-01-22 | 1913-07-24 | 1914-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-01-22 | 1917-07-24 | 1918-01-23 | $7700.00 | Window Closed / Lapsed |