Patent US2215185A successfully refreshed from Google Patents.
US2215185A
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US
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Liquid clarification
Assignee: Dorr Co
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Filing: 1937-12-31
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Granted: 1940-09-17
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Expires: 1957-12-31
Abstract
No abstract record available.
Inventors
- 👤 Florence C Lund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:18
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281; B; B01; B01D; B01D21/00; B01D21/0018; B01D21/0024; B01D21/10; B01D21/12; B01D21/16; B01D21/24; B01D21/2433; B01D21/245; B01D21/30; B01D21/34
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) | 1943-09-17 | 1944-03-18 | 1944-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-17 | 1948-03-18 | 1948-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-17 | 1952-03-18 | 1952-09-17 | $7700.00 | Window Closed / Lapsed |