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US3836681A Expired / Lapsed US ⏱️ 0.0 years remaining

Device and method of recovering sticky particulate materials such as algae

Assignee: Individual
•
Filing: 1972-03-01
•
Granted: 1974-09-17
•
Expires: 1992-03-01
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Abstract

Abstract Sticky particles (algae) are recovered from environmental liquid by being passed through a precoat on a screen, the particles being entrapped in the precoat. Dewatering and drying follow and the precoat with the entrapped particles is removed from the screen for subsequent use. The device for carrying out the method includes a screen moving in a set path. A coating unit supplies a precoat to the advancing screen. A depositing unit supplies particles in their environmental liquid to the precoat. Dewaterers and driers remove much of the liquid. The remaining, particle-precoat combination is removed from the screen preferably by a sonic whistle, and is discharged from the machine. A washer cleans the screen for reuse when necessary.

Inventors

  • 👤 J Dodd

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 13:34
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/34; C02F1/36; C02F11/00; C02F11/12; C02F11/121; C02F11/123; C02F11/13; Y; Y02; Y02W; Y02W10/00; Y02W10/30; Y02W10/37; Y10; Y10S; Y10S426/00; Y10S426/807

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-09-16 1978-03-18 1978-09-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-09-16 1982-03-18 1982-09-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-09-16 1986-03-18 1986-09-17 $7700.00 Window Closed / Lapsed

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