US2014144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus and process of operating the same
Assignee: Individual
•
Filing: 1932-09-20
•
Granted: 1935-09-10
•
Expires: 1952-09-20
Abstract
No abstract record available.
Inventors
- 👤 Mensing Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:29
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/04; B01D24/08; B01D24/38; B01D24/40; B01D24/42; B01D24/46; B01D24/4631; B01D24/4636; B01D24/4668; B01D24/4673; B01D24/4684; B01D24/48; B01D24/4869; B01D33/00; B01D33/06; B01D33/11; B01D33/44; B01D33/46; B01D33/463; B01D33/70; B01D33/74; B01D33/80; B01D33/801; B01D33/804; B01D2201/00; B01D2201/28; B01D2201/282
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) | 1938-09-09 | 1939-03-11 | 1939-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-09-09 | 1943-03-11 | 1943-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-09-09 | 1947-03-11 | 1947-09-10 | $7700.00 | Window Closed / Lapsed |