Patent US2233619A successfully refreshed from Google Patents.
US2233619A
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US
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Thickening apparatus
Assignee: Dorr Co
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Filing: 1939-01-10
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Granted: 1941-03-04
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Expires: 1959-01-10
Abstract
No abstract record available.
Inventors
- 👤 Harry A Linch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:08
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0238; B01D11/028; B01D11/0284; B01D21/00; B01D21/0018; B01D21/003; B01D21/0036; B01D21/10; B01D21/12; B01D21/14; B01D21/18; B01D21/186; B01D21/24; B01D21/2427
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) | 1944-03-03 | 1944-09-02 | 1945-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-03 | 1948-09-02 | 1949-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-03 | 1952-09-02 | 1953-03-04 | $7700.00 | Window Closed / Lapsed |