US4333738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic fire log and method for making same
Assignee: MATHIS JOHN S
•
Filing: 1980-11-24
•
Granted: 1982-06-08
•
Expires: 2000-11-24
Abstract
Abstract An improved synthetic fire log is disclosed which contains wood fibers or sawdust, coal liquid, molasses and paraffin wax in appropriate quantities. Green sawdust is first heated to a temperature of from 250 to 300 degrees F. to reduce the moisture content thereof and provide relatively dry sawdust. To the dry sawdust is added a quantity of coal liquid while the sawdust is at an elevated temperature of at least 200 degrees F. Next, molasses is added to the sawdust, coal liquid combination while the combination is in a temperature range of from 115-150 degrees F. Thereafter, paraffin wax in block form is added while the foregoing mixture is at an elevated temperature at least sufficient to melt the paraffin. Upon thorough incorporation of the materials, the resulting mixture is poured into a mold and compressed to form a stable, solid, compacted mass after which the mass is removed from the mold thus forming an improved synthetic fire log.
Inventors
- 👤 Jimmy Schrader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:54
CPC Classifications
C; C10; C10L; C10L5/00; C10L5/40; Y; Y02; Y02E; Y02E50/00; Y02E50/10; Y02E50/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
117 words
A method for making synthetic fire logs, the steps of which comprise providing a quantity of relatively dry sawdust, mixing said quantity of relatively dry sawdust with of coal liquid, molasses and wax at an elevated temperature at least sufficient to melt said wax and form a thoroughly incorporated mixture, compressing said mixture in a mold to form a compacted mass, and removing said compacted mass from said mold after said mass has cooled to a suitable handling temperature wherein the proportion of coal liquid mixed in said mixture is in a range of about 6-32 percent by weight of the total weight of said green sawdust, coal liquid, molasses and wax used to form said mixture.
Claim 2
Independent Claim
117 words
A method for making synthetic fire logs, the steps of which comprise providing a quantity of relatively dry sawdust, mixing said quantity of relatively dry sawdust with of coal liquid, molasses and wax at an elevated temperature at least sufficient to melt said wax and form a thoroughly incorporated mixture, compressing said mixture in a mold to form a compacted mass, and removing said compacted mass from said mold after said mass has cooled to a suitable handling temperature wherein the proportion of coal liquid mixed in said mixture is in a range of about 6-32 percent by weight of the total weight of said green sawdust, coal liquid, molasses and wax used to form said mixture.
Claim 3
Dependent Claim
43 words
The method of claim 1, the steps of which further comprise heating a quantity of green sawdust to a temperature range of about 250-300 degrees F. for 10-20 minutes to reduce the moisture content thereof and thereby provide said quantity of dry sawdust.
Claim 4
Dependent Claim
62 words
The method of claim 1 wherein the proportion of coal liquid mixed in said mixture is at least sufficient to increase the burning time and BTU output of said compacted mass and wherein the proportion of coal liquid and molasses in said mixture is less than that amount which will cause said compacted mass to leak or drip coal liquid when burning.
Claim 5
Dependent Claim
40 words
The method of claim 2 wherein the proportion of said coal liquid added to said mixture is about 18 percent by weight of the total weight of said green sawdust, coal liquid, molasses and wax used to form said mixture.
Claim 6
Dependent Claim
37 words
The method of claim 2 wherein the proportion of said wax added to said mixture is in a range of about 18-30 percent of the total weight of all of the materials used to form said mixture.
Claim 7
Dependent Claim
38 words
The method of claim 2 wherein the proportion of molasses added to said mixture is within a range of about 2-10 percent by weight of the total weight of all of the materials used to form said mixture.
Claim 8
Dependent Claim
12 words
A synthetic fire log made according to the method of claim 1.
Claim 9
Independent Claim
158 words
A method for making a synthetic fire log, the steps of which comprise providing a quantity of green sawdust, heating said green sawdust for a period of time to reduce the moisture content thereof and dry the same, mixing said heated sawdust with a quantity of coal liquid, mixing a quantity of molasses with said heated sawdust and coal liquid to thoroughly incorporate said quantities, mixing a quantity of wax with said incorporated quantities at a temperature level at least sufficient to melt said wax, compressing said quantities of wax, sawdust, coal liquid and molasses in a mold to form a compacted, solid mass, and removing said mass from said mold after said mass has cooled to a handling temperature wherein the proportion of coal liquid mixed in said mixture is in a range of about 6-32 percent by weight of the total weight of said green sawdust, coal liquid, molasses and wax used to form said mixture.
Claim 10
Independent Claim
158 words
A method for making a synthetic fire log, the steps of which comprise providing a quantity of green sawdust, heating said green sawdust for a period of time to reduce the moisture content thereof and dry the same, mixing said heated sawdust with a quantity of coal liquid, mixing a quantity of molasses with said heated sawdust and coal liquid to thoroughly incorporate said quantities, mixing a quantity of wax with said incorporated quantities at a temperature level at least sufficient to melt said wax, compressing said quantities of wax, sawdust, coal liquid and molasses in a mold to form a compacted, solid mass, and removing said mass from said mold after said mass has cooled to a handling temperature wherein the proportion of coal liquid mixed in said mixture is in a range of about 6-32 percent by weight of the total weight of said green sawdust, coal liquid, molasses and wax used to form said mixture.
Claim 11
Dependent Claim
12 words
A synthetic fire log made according to the method of claim 8.
Claim 12
Dependent Claim
40 words
The method of claim 1 wherein the proportion of said coal liquid added to said mixture is about 23 percent by weight of the total weight of said green sawdust, coal liquid, molasses and wax used to form said mixture.
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) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |