US4268320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyroplastoid particles, composition and method of production
Assignee: Ranger Oil Corp
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Filing: 1980-02-29
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Granted: 1981-05-19
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Expires: 2000-02-29
Abstract
Abstract Particulate material, composites containing said material, and a method of making said particulate material. The material is composed of at least about 85% (number basis) of regular, well defined ellipsoidal particles and has a particle size less than about 25 microns, about 90% and 50% by weight of the particles being less than about 15 and about 10 microns respectively in size and has a specific surface in the range of about 0.75 to about 2.5 m 2 /gram as well as a specific gravity of about 2 to about 3. The composites contain said particulate material and up to about 99% of one or more polymeric media. The particulate material may be prepared by subjecting a diverse mixture of flyash particles to dry air classification in an air classifier controlled to recover particulate solids as described above.
Inventors
- 👤 Richard M. Klingaman
- 👤 Leo C. Ehrenreich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:55
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C04; C04B; C04B18/00; C04B18/04; C04B18/06; C04B18/08; C08K7/00; C08K7/16; C08K7/18; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
99 words
Particulate material, useful as a filler for polymeric media, composed of particles: at least about 85% of which (number basis) have a well-defined, regular, ellipsoidal shape; having a particle size less than about 25μ, with at least about 90% by weight of the particles having a size less than about 15μ, and at least about 50% being less than about 10μ, the specific surface of the particles being in the range of about 0.75 to about 2.5 square meters per gram; said particles having a specific gravity of about two to three, and being composed substantially of alumino-silicate glass.
Claim 2
Dependent Claim
99 words
Particulate material, useful as a filler for polymeric media, composed of particles: at least about 85% of which (number basis) have a well-defined, regular, ellipsoidal shape; having a particle size less than about 25μ, with at least about 90% by weight of the particles having a size less than about 15μ, and at least about 50% being less than about 10μ, the specific surface of the particles being in the range of about 0.75 to about 2.5 square meters per gram; said particles having a specific gravity of about two to three, and being composed substantially of alumino-silicate glass.
Claim 3
Dependent Claim
22 words
Particulate material according to claim 1 wherein at least about 90% of said particles (number basis) have said well-defined, regular, ellipsoidal shape.
Claim 4
Dependent Claim
22 words
Particulate material according to claim 1 wherein at least about 95% of said particles (number basis) have said well-defined, regular, ellipsoidal shape.
Claim 5
Dependent Claim
18 words
Particulate material according to claim 1 wherein at least about 77% of said particles (number basis) are spherical.
Claim 6
Dependent Claim
18 words
Particulate material according to claim 1 wherein at least about 83% of said particles (number basis) are spherical.
Claim 7
Dependent Claim
18 words
Particulate material according to claim 1 wherein at least about 90% of said particles (number basis) are spherical.
Claim 8
Dependent Claim
31 words
Particulate material according to claim 1 wherein at least about 90% and at least about 50% by weight of the particles have diameters less than about 12μ and about 7μ respectively.
Claim 9
Dependent Claim
22 words
Particulate material according to claim 1 wherein the specific surface of the particles is about 1 to 2 square meters per gram.
Claim 10
Dependent Claim
23 words
Particulate material according to claim 1 wherein the specific surface of the particles is about 1.1 to about 1.7 square meters per gram.
Claim 11
Dependent Claim
19 words
Particulate material according to claim 1 wherein said particles have a specific gravity of about 2.2 to about 2.6.
Claim 12
Dependent Claim
19 words
Particulate material according to claim 1 wherein said particles have a specific gravity of about 2.35 to about 2.5.
Claim 13
Dependent Claim
18 words
Particulate material according to claim 1 wherein at least 85% (number basis) of the particles are substantially non-hollow.
Claim 14
Dependent Claim
30 words
Particulate material according to claim 1 characterized by the property that less than 10% of the particles counted in a potted and polished sample disclose the presence of central voids.
Claim 15
Dependent Claim
30 words
Particulate material according to claim 1 characterized by the property that less than 5% of the particles counted in a potted and polished sample disclose the presence of central voids.
Claim 16
Dependent Claim
16 words
Particulate material according to claim 1 having a bulk density of about 1.1 to about 1.4
Claim 17
Dependent Claim
16 words
Particulate material according to claim 1 having a bulk density of about 1.2 to about 1.3
Claim 18
Dependent Claim
23 words
Particulate material according to claim 1 wherein said particles are amorphous or generally amorphous particles containing up to about 5% of crystalline material.
Claim 19
Dependent Claim
23 words
Particulate material according to claim 1 wherein said particles contain less than 1% by weight of components soluble in water at room temperature.
Claim 20
Dependent Claim
24 words
Particulate material according to claim 1 wherein said particles contain less than 1% by weight of components which are thermally labile at 500° C.
Claim 21
Dependent Claim
32 words
Particulate material according to claim 1 wherein said particles contain less than 1% by weight of components soluble in water at room temperature and components which are thermally labile at 500° C.
Claim 22
Dependent Claim
24 words
Particulate material according to claim 1 characterized by receptivity to tenacious coupling with polymeric media or with silane or titanate coupling agents or both.
Claim 23
Dependent Claim
36 words
Particulate material according to claim 1 wherein the quantity of calcium oxide and hydroxide available on the surfaces of the particles for reaction with acid, if any, is less than 10% of the total particle weight.
Claim 24
Dependent Claim
36 words
Particulate material according to claim 1 wherein the quantity of calcium oxide and hydroxide available on the surfaces of the particles for reaction with acid, if any, is less than 1% of the total particle weight.
Claim 25
Dependent Claim
16 words
Particulate material according to claim 1 wherein said particles are stable against decrepitation at 300° C.
Claim 26
Dependent Claim
16 words
Particulate material according to claim 1 wherein said particles are stable against decrepitation at 600° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |