US1987597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filtering apparatus
Assignee: Cuno Engineered Products Inc
•
Filing: 1932-08-05
•
Granted: 1935-01-15
•
Expires: 1952-08-05
Abstract
No abstract record available.
Inventors
- 👤 Charles H Cuno
- 👤 Philip E Ashton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:10
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/44; B01D29/46; B01D25/00; B01D25/30; B01D25/32; B01D25/34
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) | 1938-01-14 | 1938-07-16 | 1939-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-14 | 1942-07-16 | 1943-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-14 | 1946-07-16 | 1947-01-15 | $7700.00 | Window Closed / Lapsed |