US2829773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of clarifying alginic liquor
Assignee: Kelco Co
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Filing: 1955-06-07
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Granted: 1958-04-08
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Expires: 1975-06-07
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Saddington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:06
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A METHOD OF FILTERING HAZE PARTICLES OUT OF A SOLUTION OF THE CHARACTER DESCRIBED WHEREIN A FILER CAKE IS FORMED ON A FILTER SCREEN FOR THE FORCED FLOW OF THE SOLUTION THERETHROUGH, AND A LAYER OF SAID FILTER CAKE IS PERIODICALLY REMOVED TO EXPOSED FRESH SURFACE THEREOF TO THE SOLUTION,THE IMPROVEMENT WHICH CONSISTS IN FORMING THE FILTER CAKE OF PARTICLES OF VESICULATED PERLITIC MINERAL, MORE THAN 60% BY WEIGHT OF WHICH PARTICLES WILL PASS THROUGH A #100 U. S. SERIES SCREEN.
Claim 2
Dependent Claim
82 words
IN A METHOD OF FILTERING HAZE PARTICLES OUT OF A SOLUTION OF THE CHARACTER DESCRIBED WHEREIN A FILER CAKE IS FORMED ON A FILTER SCREEN FOR THE FORCED FLOW OF THE SOLUTION THERETHROUGH, AND A LAYER OF SAID FILTER CAKE IS PERIODICALLY REMOVED TO EXPOSED FRESH SURFACE THEREOF TO THE SOLUTION,THE IMPROVEMENT WHICH CONSISTS IN FORMING THE FILTER CAKE OF PARTICLES OF VESICULATED PERLITIC MINERAL, MORE THAN 60% BY WEIGHT OF WHICH PARTICLES WILL PASS THROUGH A #100 U. S. SERIES SCREEN.
References Cited (Backward Citations)
US1946039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |