US1072189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fan.
Assignee: Sparks Withington Co
•
Filing: 1911-10-17
•
Granted: 1913-09-02
•
Expires: 1931-10-17
Abstract
No abstract record available.
Inventors
- 👤 William Sparks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:13
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/325; F04D29/326; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1916-09-01 | 1917-03-03 | 1917-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-09-01 | 1921-03-03 | 1921-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-09-01 | 1925-03-03 | 1925-09-02 | $7700.00 | Window Closed / Lapsed |