US998975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating, cooling, and ventilating system.
Assignee: PLURAL SYSTEM VENTILATOR CO
•
Filing: 1910-03-05
•
Granted: 1911-07-25
•
Expires: 1930-03-05
Abstract
No abstract record available.
Inventors
- 👤 Frank P Mies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:34
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/236; B01F23/2362; Y; Y10; Y10S; Y10S261/00; Y10S261/34
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) | 1914-07-24 | 1915-01-23 | 1915-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-07-24 | 1919-01-23 | 1919-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-07-24 | 1923-01-23 | 1923-07-25 | $7700.00 | Window Closed / Lapsed |