US1812773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapered tube filter press
Assignee: CANNON PRUTZMAN TREATING PROCE
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Filing: 1929-10-02
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Granted: 1931-06-30
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Expires: 1949-10-02
Abstract
No abstract record available.
Inventors
- 👤 Cannon Hugh Harley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:44
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/117; B01D29/118; B01D29/50; B01D29/52; B01D29/62; B01D29/64; B01D29/6469; B01D29/6484; B01D29/66; B01D29/76; B01D29/80; B01D29/84; B01D29/88; B01D29/885; B01D29/90; B01D29/908; B01D29/94; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0453
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) | 1934-06-29 | 1934-12-29 | 1935-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-29 | 1938-12-29 | 1939-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-29 | 1942-12-29 | 1943-06-30 | $7700.00 | Window Closed / Lapsed |