US4839394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fillers for use in casting marble products
Assignee: ARTISTCRAFT Ltd
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Filing: 1986-10-30
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Granted: 1989-06-13
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Expires: 2006-10-30
Abstract
Abstract A filler composition for mixing with a resin to form a castable marble-like product comprises an inorganic filler material, such as calcium carbonate in powdered form admixed with components which considerably reduce the density of the cast product. The weight reducing components may be hollow ceramic spheres in combination with hollow plastic spheres. The plastic spheres have an average diameter significantly less than the average diameter of the ceramic spheres. The plastic spheres act as cushion to minimize break up and degradation of the ceramic spheres. When the filler composition is admixed with a resin, the resultant cast product is considerably lighter than existing cast marble-like products.
Inventors
- 👤 Clive A. Champion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:16
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/10; C04B26/18; C04B16/00; C04B16/04; C04B16/08; C08; C08J; C08J9/00; C08J9/32; C08K; C08K7/00; C08K7/22; C08K7/24; C04B2111/00; C04B2111/54; C04B2111/542; C04B2111/545
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
53 words
A filler composition for mixing with a resin to form a castable product, said filler composition comprising an inorganic mineral filler material in powder form admixed with hollow ceramic spheres of a diameter ranging from 10 to 300 microns and hollow plastic spheres having an average diameter of approximately 3 to 5 microns.
Claim 2
Dependent Claim
53 words
A filler composition for mixing with a resin to form a castable product, said filler composition comprising an inorganic mineral filler material in powder form admixed with hollow ceramic spheres of a diameter ranging from 10 to 300 microns and hollow plastic spheres having an average diameter of approximately 3 to 5 microns.
Claim 3
Dependent Claim
14 words
A filler composition of claim 1, wherein said plastic spheres are made of polyvinylidenechloride.
Claim 4
Dependent Claim
25 words
A filler composition of claim 1, wherein said plastic spheres are electrically charged to provide a degree of attraction to surfaces of said ceramic spheres.
Claim 5
Dependent Claim
31 words
A filler composition of claim 1, wherein said plastic spheres cushion said ceramic spheres to minimize break up of said ceramic spheres during handling, mixing and casting of said filler composition.
Claim 6
Dependent Claim
14 words
A filler composition of claim 1, wherein said inorganic filler material is a mineral.
Claim 7
Dependent Claim
13 words
A filler composition of claim 5, wherein said mineral is CaCO 3 .
Claim 8
Dependent Claim
18 words
A filler composition of claim 1, wherein said ceramic spheres have an average diameter of approximately 100 microns.
Claim 9
Dependent Claim
26 words
A filler composition of claim 7, wherein said ceramic spheres have an specific gravity of approximately 0.70 and a bulk density of 25 lbs/ft 3 .
Claim 10
Dependent Claim
36 words
A filler composition of claim 6, wherein said composition comprises by weight: (1) approximately 70% to 80% of calcium carbonate; (2) approximately 17% to 27.5% of ceramic spheres; (3) approximately 2.5% to 3.0% of plastic spheres.
Claim 11
Dependent Claim
36 words
A filler composition of claim 9, wherein said composition comprises approximately 75% by weight of said CaCO 3 . approximately 22% by weight of said ceramic spheres and approximately 3% by weight of said plastic spheres.
Claim 12
Dependent Claim
38 words
A filler composition of claim 9 or 10, wherein said CaCO 3 powder has a screen analysis on a percent retained cumulative basis of: 40 mesh--0.13% 50 mesh--3.08% 60 mesh--8.95% 70 mesh--16.30% 100 mesh--13.67% 200 mesh--54.42% 325 mesh--74.30%.
Claim 13
Dependent Claim
37 words
A filler composition of claim 9 or 10, wherein said composition has a screen analysis on a percent retained cumulative basis of: 30 mesh--0.039% 40 mesh--0.43% 50 mesh--5.80% 60 mesh--14.76% 70mesh--24.50% 100 mesh--33.94% 200 mesh--66.16% 325 mesh--90.71%.
Claim 14
Dependent Claim
20 words
A cast product comprising a filler composition of claim 1 admixed with a color pigment and set with a resin.
Claim 15
Dependent Claim
14 words
A cast product of claim 13, wherein said resin is an unsaturated polyester resin.
Claim 16
Dependent Claim
36 words
A cast product of claim 14 wherein inorganic filler material is a powdered calcium carbonate having granular elongate crystals, said crystals of calcium carbonate as bonded by said resin increasing tensile strength of said cast product.
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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |