US4414013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making black glass by utilizing incinerated waste glass
Assignee: Individual
•
Filing: 1982-04-26
•
Granted: 1983-11-08
•
Expires: 2002-04-26
Abstract
Abstract A process and a product made by the process for producing black glass from incinerated municipal waste including separating metal, stone and ash from the waste; melting the glass material comprising ferrous oxide and ferric oxide to convert at least a portion of the iron oxides to Fe3O4, thereby causing the black coloration; and thereafter solidifying the molten glass.
Inventors
- 👤 David A. Connell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:47
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/002; F; F24; F24S; F24S70/00; F24S70/10; Y; Y02; Y02E; Y02E10/00; Y02E10/40
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
130 words
A process for producing black glass comprising: (a) reclaiming glass material including ferrous oxide and ferric oxide from incinerated municipal waste, (b) melting said glass material in the range from about 1300° C. to about 1500° C. to convert at least a portion of the iron oxides therein to Fe 3 O 4 , thereby causing black coloration of the glass material and stratifying the mixture wherein one of the layers comprises a substantially homogeneous black glass, (c) cooling the molten glass to obtain a middle layer of substantially homogeneous black glass and a top and bottom layer of non-homogenerous material, the top layer being of extraneous and undisolved matter and the bottom layer being of concentrated metals, (d) removing the non-homogeneous material from the substantially homogeneous black glass layer.
Claim 2
Dependent Claim
21 words
A process according to claim 1, including separating metal, stone and ash from the incinerated waste to obtain said glass material.
Claim 3
Dependent Claim
17 words
A process according to claim 2, wherein said separation step is completed prior to said melting step.
Claim 4
Dependent Claim
14 words
A process according to claim 2, wherein said separation step is effected by screening.
Claim 5
Dependent Claim
30 words
A process according to claim 4, wherein material having a particle size less than 4 mm or greater than two inches is removed from said glass material by said screening.
Claim 6
Dependent Claim
18 words
A process according to claim 2, wherein said separation is effected at least in part by magnetic separation.
Claim 7
Dependent Claim
21 words
A process according to claim 1, wherein said glass material comprises from about 5 to about 15 weight percent iron oxides.
Claim 8
Dependent Claim
18 words
A process according to claim 1, wherein said melting is effected at a temperature of about 1430° C.
Claim 9
Dependent Claim
27 words
A process according to claim 1, including remelting the substantially homogeneous black glass, shaping the remelted glass into a desired shape and annealing in the desired shape.
Claim 10
Dependent Claim
14 words
A process according to claim 1 including maintaining said temperature for about three hours.
Claim 11
Dependent Claim
30 words
A process according to claim 1, wherein the solidifying is accomplished by cooling the stratified mixture to about room temperature over a period of between about twelve to sixteen hours.
Claim 12
Dependent Claim
27 words
A process according to claim 1 including remelting the substantially homogeneous black glass layer at a temperature of at least 1300° C. for at least two hours.
Claim 13
Dependent Claim
23 words
A process according to claim 12 including pouring the remelted glass into molds for shaping into a desired form and annealing the form.
Claim 14
Dependent Claim
21 words
A process according to claim 1 including the substantially homogeneous black glass and shaping the remelted glass into a solar collector.
Claim 15
Dependent Claim
16 words
A process according to claim 14 including forming passageways through the interior of the solar collector.
Claim 16
Dependent Claim
15 words
A process according to claim 15 wherein said passages are formed during said shaping step.
Claim 17
Dependent Claim
20 words
A process according to claim 15 wherein said passages are formed by etching through the interior of said solar collector.
Claim 18
Dependent Claim
15 words
A process according to claim 14 including shaping said solar collector into a flat plate.
References Cited (Backward Citations)
GB190605671A
Cited
GB244358A
Cited
US2576565A
Cited
US3354245A
Cited
SU415242A1
Cited
US3907582A
Cited
US3900303A
Cited
GB1412545A
Cited
US3944352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |