US1969022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the clarification of sewage liquid
Assignee: Filtration Equipment Corp
•
Filing: 1932-11-23
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Granted: 1934-08-07
•
Expires: 1952-11-23
Abstract
No abstract record available.
Inventors
- 👤 William C Laughlin
- 👤 Abraham B Asch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:36
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0012; B01D21/0006; B01D21/0018; B01D21/02; B01D21/04; B01D21/06; B01D21/08; C; C02; C02F; C02F1/00; C02F1/001; C02F1/004; C02F2001/007
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) | 1937-08-06 | 1938-02-05 | 1938-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-06 | 1942-02-05 | 1942-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-06 | 1946-02-05 | 1946-08-07 | $7700.00 | Window Closed / Lapsed |