US4147687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formed objects of coal flyash and methods of making the same
Assignee: Individual
•
Filing: 1977-06-23
•
Granted: 1979-04-03
•
Expires: 1997-06-23
Abstract
Abstract A new decorative and structural product and method of making the same is provided wherein coal flyash as a major component is mixed with a thermosetting or thermoplastic resin and formed under heat and pressure into a desired shape.
Inventors
- 👤 Hugh T. O'Donnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:14
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C08; C08L; C08L95/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A new rigid, formed decorative and structural product consisting of about 75% to 95% coal flyash and the balance a matrix of plastic resin from the group consisting of thermoplastic and thermosetting resins and an effective amount of 0.1% up to 1% of mineral oil to aid mixing of the coal flyash and the plastic resin.
Claim 2
Dependent Claim
56 words
A new rigid, formed decorative and structural product consisting of about 75% to 95% coal flyash and the balance a matrix of plastic resin from the group consisting of thermoplastic and thermosetting resins and an effective amount of 0.1% up to 1% of mineral oil to aid mixing of the coal flyash and the plastic resin.
Claim 3
Dependent Claim
15 words
A product as claimed in claim 1 wherein the plastic resin is a thermoplastic resin.
Claim 4
Dependent Claim
15 words
A product as claimed in claim 1 wherein the plastic resin is a thermosetting resin.
Claim 5
Dependent Claim
11 words
A product as claimed in claim 1 formed by hot extrusion.
Claim 6
Independent Claim
91 words
A method of forming decorative and structural products comprising the steps of (a) admixing a two component system consisting of about 75% to 95% coal flyash with about 5% to 25% by weight of a plastic resin from the group consisting of thermoplastic and thermosetting resins and an effective amount of 0.1% up to about 1% of mineral oil to aid mixing of the coal flyash and the plastic resin. (b) heating the mixture to a temperature sufficient to provide the desired plasticity, and (c) forming the desired product under pressure.
Claim 7
Independent Claim
91 words
A method of forming decorative and structural products comprising the steps of (a) admixing a two component system consisting of about 75% to 95% coal flyash with about 5% to 25% by weight of a plastic resin from the group consisting of thermoplastic and thermosetting resins and an effective amount of 0.1% up to about 1% of mineral oil to aid mixing of the coal flyash and the plastic resin. (b) heating the mixture to a temperature sufficient to provide the desired plasticity, and (c) forming the desired product under pressure.
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) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |