US1681382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic-fluid cleaner
Assignee: Individual
•
Filing: 1927-10-08
•
Granted: 1928-08-21
•
Expires: 1947-10-08
Abstract
No abstract record available.
Inventors
- 👤 John L Torkelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:52
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; B05; B05B; B05B1/00; B05B1/30; B05B1/3033; B05B1/3073; B05B1/34
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) | 1931-08-21 | 1932-02-20 | 1932-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-08-21 | 1936-02-20 | 1936-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-08-21 | 1940-02-20 | 1940-08-21 | $7700.00 | Window Closed / Lapsed |