US3447683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation apparatus and method for mixed impurities on the exposed surface of a liquid body
Assignee: Idreco USA Ltd
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Filing: 1967-05-15
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Granted: 1969-06-03
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Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 Laurence E Luce Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:17
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/36; B01; B01D; B01D21/00; B01D21/24; B01D21/2433; B01D21/2438; B01D21/2488; B03B11/00; B03B2011/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1529750A
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US1618338A
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US1648607A
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US2142206A
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US2235052A
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US2592983A
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US3314540A
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US3339345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |