Patent FR442088A successfully refreshed from Google Patents.
Patent US4681768A successfully refreshed from Google Patents.
US4681768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of cooking oils and fats
Assignee: Dallas Group of America Inc
•
Filing: 1985-08-14
•
Granted: 1987-07-21
•
Expires: 2005-08-14
Abstract
Abstract Cooking oil is treated with synthetic amorphous magnesium silicate having a surface area of at least 300 square meters per gram to permit reuse of the oil for cooking.
Inventors
- 👤 W. Joseph Mulflur
- 👤 James R. Munson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:23
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
A process for treating used cooking oil or fat, comprising: contacting used cooking oil or fat with a high surface area amorphous synthetic magnesium silicate having a surface area of at least 300 sq. meters per gram, said magnesium silicate being employed in an amount effective to reduce the content of free fatty acid in the oil or fat and permit reuse of the oil or fat for cooking.
Claim 2
Dependent Claim
69 words
A process for treating used cooking oil or fat, comprising: contacting used cooking oil or fat with a high surface area amorphous synthetic magnesium silicate having a surface area of at least 300 sq. meters per gram, said magnesium silicate being employed in an amount effective to reduce the content of free fatty acid in the oil or fat and permit reuse of the oil or fat for cooking.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the magnesium silicate has a surface area of 400-600 square meters per gram.
Claim 4
Dependent Claim
41 words
The process of claim 2 wherein the magnesium silicate has a particle size such that at least 75% of the particles have a size greater than 400 mesh and no more than 15% have a particle size greater than 40 mesh.
Claim 5
Dependent Claim
18 words
The process of claim 2 wherein the magnesium silicate has an average particle size of from 20-75 microns.
Claim 6
Dependent Claim
17 words
The process of claim 4 wherein the magnesium silicate has a bulk density of from 25-32 lbs./cu.ft.
Claim 7
Dependent Claim
23 words
The process of claim 1 wherein the magnesium silicate is employed in an amount of at least 0.002 lb./lb. of oil or fat.
Claim 8
Dependent Claim
18 words
The process of claim 6 wherein subsequent to said contacting, the oil is filtered to remove particulate material.
Claim 9
Dependent Claim
17 words
The process of claim 7 wherein the oil is filtered in the presence of a filter aid.
Claim 10
Dependent Claim
18 words
The process of claim 7 wherein the magnesium silicate has an average particle size of from 20-75 microns.
Claim 11
Dependent Claim
19 words
The process of claim 9 wherein the magnesium silicate has a surface area of 400-600 sq. meters per gram.
Claim 12
Dependent Claim
20 words
The process of claim 10 wherein the magnesium silicate has a bulk density of from 25-32 lbs. per cu. ft.
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) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |