Patent US3473661A successfully refreshed from Google Patents.
US3473661A
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Method and apparatus for removing suspended solids from liquids
Assignee: Union Tank Car Co
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Filing: 1967-12-27
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Granted: 1969-10-21
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Expires: 1987-12-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Duff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:50
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/24; B01D21/245; B01D21/0012; B01D21/0039; B01D21/0042; B01D21/02; B01D21/04; B01D21/06; B01D21/2405; B01D21/2427; B01D21/2444; B01D24/00; B01D24/002; B01D24/005; B01D24/007; B01D24/02; B01D24/10; B01D24/14; B01D24/46; B01D24/4631; B01D35/00; B01D35/14; B01D35/153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US553763A
Cited
US1624382A
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US827400A
Cited
US1149750A
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US1166802A
Cited
US1398285A
Cited
US2948400A
Cited
US3306447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |