US1935642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clarifier
Assignee: Filtration Equipment Corp
•
Filing: 1929-06-06
•
Granted: 1933-11-21
•
Expires: 1949-06-06
Abstract
No abstract record available.
Inventors
- 👤 William C Laughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:33
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0006; B01D21/003; B01D21/0039; B01D21/0042; B01D21/02; B01D21/24; B01D21/2405; B01D21/2427; B01D21/2444; B01D21/245; B01D29/00; B01D29/01; B01D29/50; B01D29/52; B01D2201/00; B01D2201/20; B01D2201/204; B01D2201/206; B01D24/00; B01D24/02; B01D24/20; B01D24/205
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) | 1936-11-20 | 1937-05-22 | 1937-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-11-20 | 1941-05-22 | 1941-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-11-20 | 1945-05-22 | 1945-11-21 | $7700.00 | Window Closed / Lapsed |