US4373005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulation material
Assignee: PRM Energy Systems Inc
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Filing: 1981-05-13
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Granted: 1983-02-08
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Expires: 2001-05-13
Abstract
Abstract Disclosed is an improved insulation material which comprises a substantially homogeneous mixture of inorganic, non-flammable, fibrous material and discrete particles of expanded amorphous glass.
Inventors
- 👤 John D. Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:31
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/04; C04B20/06; C04B30/00; C04B30/02; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249986; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2982
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
51 words
An insulation material, which comprises: a quantity of inorganic non-flammable fibrous material consisting of loose fibers; and 10-75% by weight of discrete expanded silicate particles substantially homogeneously dispersed among said loose fibers throughout said fibrous material to form a substantially homogenous mixture adapted for use as a loose fill insulation material.
Claim 2
Dependent Claim
51 words
An insulation material, which comprises: a quantity of inorganic non-flammable fibrous material consisting of loose fibers; and 10-75% by weight of discrete expanded silicate particles substantially homogeneously dispersed among said loose fibers throughout said fibrous material to form a substantially homogenous mixture adapted for use as a loose fill insulation material.
Claim 3
Dependent Claim
15 words
The insulation material as claimed in claim 1, wherein said fibrous material includes mineral wool.
Claim 4
Dependent Claim
15 words
The insulation material as claimed in claim 1, wherein said fibrous material includes glass fibers.
Claim 5
Dependent Claim
22 words
The insulation material as claimed in claim 1, wherein said fibrous material and said expanded silicate particles have substantially the same density.
Claim 6
Independent Claim
51 words
A method of making an insulation material, which comprises the steps of: forming a substantially homogeneous mixture of a quantity of inorganic non-flammable fibrous material and a quantity of discrete unexpanded silicate particles; and heating the mixture to a temperature sufficient to expand the silicate particles without melting said fibrous material.
Claim 7
Independent Claim
51 words
A method of making an insulation material, which comprises the steps of: forming a substantially homogeneous mixture of a quantity of inorganic non-flammable fibrous material and a quantity of discrete unexpanded silicate particles; and heating the mixture to a temperature sufficient to expand the silicate particles without melting said fibrous material.
Claim 8
Independent Claim
128 words
A method of making an insulation material comprising a substantially homogeneous mixture of loose inorganic non-flammable fibrous material and discrete particles of expanded silicate, which comprises the steps of: forming a stream of gas having a temperature higher than the expansion point of said expanded silicate and lower than the melting point of said fibrous material; injecting a quantity of discrete particles of unexpanded silicate into said stream of gas to be carried therewith; injecting a quantity of inorganic non-flammable fibrous material into said stream of gas such that said unexpanded silicate particles disperse among the fibers of said fibrous material to form a substantially homogeneous mixture therewith, whereby said mixture is carried with said stream of gas and said unexpanded silicate particles expand within said fibrous material.
Claim 9
Independent Claim
128 words
A method of making an insulation material comprising a substantially homogeneous mixture of loose inorganic non-flammable fibrous material and discrete particles of expanded silicate, which comprises the steps of: forming a stream of gas having a temperature higher than the expansion point of said expanded silicate and lower than the melting point of said fibrous material; injecting a quantity of discrete particles of unexpanded silicate into said stream of gas to be carried therewith; injecting a quantity of inorganic non-flammable fibrous material into said stream of gas such that said unexpanded silicate particles disperse among the fibers of said fibrous material to form a substantially homogeneous mixture therewith, whereby said mixture is carried with said stream of gas and said unexpanded silicate particles expand within said fibrous material.
Claim 10
Dependent Claim
12 words
The method of claim 6, wherein said fibrous material is rock wool.
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) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |