Patent US3312984A successfully refreshed from Google Patents.
US4313997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perlite boards and method for making same
Assignee: Grefco Inc
•
Filing: 1980-07-14
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Granted: 1982-02-02
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Expires: 2000-07-14
Abstract
Abstract Perlite board made from expanded perlite and a binder having the property of permanent tackiness in the dry state. The board may be made by expanding the perlite, adding a tacky resin emulsion to the perlite, drying the mixture and forming it into a board-like product.
Inventors
- 👤 David L. Ruff
- 👤 Narikottile G. Nath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:19
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/04; C04B26/06; Y; Y10; Y10S; Y10S106/00; Y10S106/02; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/2998
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
32 words
A perlite board having a thickness greater than about 1 inch said perlite board comprising particles of expanded perlite and a binder having the property of permanent tackiness in the dry state.
Claim 2
Dependent Claim
32 words
A perlite board having a thickness greater than about 1 inch said perlite board comprising particles of expanded perlite and a binder having the property of permanent tackiness in the dry state.
Claim 3
Dependent Claim
41 words
The board of claim 1 wherein said perlite comprises from about 65% to about 95% by weight of the final composition and said binder, expressed as a solid, comprises from about 5% to about 35% by weight of the final composition.
Claim 4
Dependent Claim
11 words
The board of claim 1 further including a reinforcing fiber material.
Claim 5
Dependent Claim
10 words
The board of claim 3 further including a waterproofing material.
Claim 6
Dependent Claim
10 words
The board of claim 1 wherein he binder is organic.
Claim 7
Dependent Claim
13 words
The board of claim 5 wherein the binder is a polyacrylic resin compound.
Claim 8
Dependent Claim
10 words
The board of claim 1 wherein the binder is inorganic.
Claim 9
Dependent Claim
79 words
A perlite board consisting essentially of 65 to 95% by weight expanded perlite, 5 to 35% by weight organic binder, said binder having the property of permanent tackiness in the dry state, reinforcing fibers in an amount up to about 15% by weight, asphalt in an amount up to 10% by weight, silicone in an amount up to 2% by weight, said board having a density in the range of from about 7 to 15 pounds per cubic foot.
Claim 10
Dependent Claim
79 words
A perlite board consisting essentially of 65 to 95% by weight expanded perlite, 5 to 35% by weight organic binder, said binder having the property of permanent tackiness in the dry state, reinforcing fibers in an amount up to about 15% by weight, asphalt in an amount up to 10% by weight, silicone in an amount up to 2% by weight, said board having a density in the range of from about 7 to 15 pounds per cubic foot.
Claim 11
Dependent Claim
54 words
A process for making expanded perlite board of a thickness greater than about 1 inch comprising the steps of: expanding said perlite; adding a tacky resin emulsion having the property of permanent tackiness in the dry state to said perlite to form a mixture; drying said mixture; and fabricating said dried mixture into boards.
Claim 12
Dependent Claim
54 words
A process for making expanded perlite board of a thickness greater than about 1 inch comprising the steps of: expanding said perlite; adding a tacky resin emulsion having the property of permanent tackiness in the dry state to said perlite to form a mixture; drying said mixture; and fabricating said dried mixture into boards.
Claim 13
Dependent Claim
16 words
A process according to claim 9 including the step of mixing fiber with said expanded perlite.
Claim 14
Dependent Claim
41 words
A process according to claim 9 including the steps of mixing a dilute asphalt emulsion with the expanded perlite; and drying the resulting mixture of the asphalt emulsion and the perlite prior to the step of adding said tacky resin emulsion.
Claim 15
Dependent Claim
13 words
The perlite board of claim 1 wherein said board is flexible and resilient.
Claim 16
Dependent Claim
13 words
The perlite board of claim 8 wherein said board is flexible and resilient.
Claim 17
Dependent Claim
12 words
The process of claim 9 wherein said boards are flexible and resilient.
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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) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |