US1833335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter press
Assignee: Individual
•
Filing: 1930-03-03
•
Granted: 1931-11-24
•
Expires: 1950-03-03
Abstract
No abstract record available.
Inventors
- 👤 Paul W Prutzman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:57
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/16; B01D29/00; B01D29/01; B01D29/05; B01D29/07; B01D29/072; B01D29/50; B01D29/52; B01D29/54; B01D29/62; B01D29/64; B01D29/6469; B01D29/6476; B01D29/88; B01D29/92; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19079; Y10T74/19084
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) | 1934-11-23 | 1935-05-25 | 1935-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-23 | 1939-05-25 | 1939-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-23 | 1943-05-25 | 1943-11-24 | $7700.00 | Window Closed / Lapsed |