US982393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forcing air.
Assignee: SPENCER TURBINE CLEANER Co
•
Filing: 1907-01-09
•
Granted: 1911-01-24
•
Expires: 1927-01-09
Abstract
No abstract record available.
Inventors
- 👤 Ira H Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:17
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/06; F04D7/065
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) | 1914-01-23 | 1914-07-25 | 1915-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-01-23 | 1918-07-25 | 1919-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-01-23 | 1922-07-25 | 1923-01-24 | $7700.00 | Window Closed / Lapsed |