US1233246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust-collector.
Assignee: EARL B EWEN
•
Filing: 1916-11-16
•
Granted: 1917-07-10
•
Expires: 1936-11-16
Abstract
No abstract record available.
Inventors
- 👤 Frederick Kerlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:55
CPC Classifications
B; B04; B04C; B04C3/00; Y; Y10; Y10S; Y10S55/00; Y10S55/32
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) | 1920-07-09 | 1921-01-08 | 1921-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-07-09 | 1925-01-08 | 1925-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-07-09 | 1929-01-08 | 1929-07-10 | $7700.00 | Window Closed / Lapsed |