US4764384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of filtering spent cooking oil
Assignee: GYCOR INTERNATIONAL Ltd A CORP OF ILLINOIS
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Filing: 1986-04-03
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Granted: 1988-08-16
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Expires: 2006-04-03
Abstract
Abstract A filtering media for use with edible liquids consisting of 80 percent synthetic amorphous silica, 10 percent synthetic amorphous magnesium silicate, 9 percent diatomaceous earth, and 1 percent synthetic amorphous silica-alumina. The process of rejuvenating spent cooking oil by admixing the filtering media in the spent cooking oil, maintaining the mixture at a temperature of 275° F. for a period of about five minutes, and filtering the mixture to remove particulate matter including the filtering media.
Inventors
- 👤 John Gyann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:28
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
The method of rejuvenating spent cooking oil containing contaminants from a cooker comprising the steps of retaining the cooking oil in the cooker, admixing with the cooking oil a filtering media comprising synthetic amorphous silica provided with moisture, synthetic amorphous magnesium silicate, and diatomaceous earth, to form a slurry of cooking oil, contaminants and filtering media, thereafter maintaining the temperature of the slurry above 100° F. for a period of about five minutes to transfer a portion of the contaminants from the cooking oil to the filtering media, and thereafter draining the slurry from the cooker through a filter to remove the filtering media with contaminants from the cooking oil.
Claim 2
Independent Claim
110 words
The method of rejuvenating spent cooking oil containing contaminants from a cooker comprising the steps of retaining the cooking oil in the cooker, admixing with the cooking oil a filtering media comprising synthetic amorphous silica provided with moisture, synthetic amorphous magnesium silicate, and diatomaceous earth, to form a slurry of cooking oil, contaminants and filtering media, thereafter maintaining the temperature of the slurry above 100° F. for a period of about five minutes to transfer a portion of the contaminants from the cooking oil to the filtering media, and thereafter draining the slurry from the cooker through a filter to remove the filtering media with contaminants from the cooking oil.
Claim 3
Dependent Claim
49 words
The method of rejuvenating spent cooking oil containing contaminants comprising the steps of claim 1 wherein the filtering media includes synthetic amorphous silica-alumina and consists of 80 percent synthetic amorphous silica, 10 percent synthetic amorphous magnesium silicate, 9 percent diatomaceous earth, and 1 percent synthetic amorphous silica-alumina by weight.
Claim 4
Dependent Claim
31 words
The method of rejuvenating spent cooking oil containing contaminants comprising the steps of claim 2 wherein the synthetic amorphous silica-alumina and diatomaceous earth have particle sizes between 20 and 25 microns.
Claim 5
Dependent Claim
34 words
The method of rejuvenating spent cooking oil containing contaminants comprising the steps of claim 2 wherein the the slurry is maintained at a temperature of about 275° Fahrenheit for a period of five minutes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |