Patent US494467A successfully refreshed from Google Patents.
Patent US4079170A successfully refreshed from Google Patents.
US4079170A
Expired / Lapsed
US
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Wax saturated expanded polystyrene and method of manufacture
Assignee: Individual
•
Filing: 1977-07-08
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Granted: 1978-03-14
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Expires: 1997-07-08
Abstract
Abstract Wax saturated expanded polystyrene or other type of open-cell foamed product and method of manufacture for increasing its surface and/or body compressive and tensile strengths rendering the resulting product effective as a building material.
Inventors
- 👤 Carwin B. Cluff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:07
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; B; B29; B29C; B29C44/00; B29C44/34; B29C44/56; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/205; C08J2491/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/31504; Y10T428/31801
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
A substantially non-porous article comprising: a sheet of foamed polystyrene or other cellular material having open, connected cells, said sheet having its open cells substantially or entirely filled with a thermosetting wax composition hardened after the wax in a liquid form was forced throughout the sheet under pressure, whereby the wax in the polystyrene sheet is substantially uniformly disposed throughout the article.
Claim 2
Dependent Claim
62 words
A substantially non-porous article comprising: a sheet of foamed polystyrene or other cellular material having open, connected cells, said sheet having its open cells substantially or entirely filled with a thermosetting wax composition hardened after the wax in a liquid form was forced throughout the sheet under pressure, whereby the wax in the polystyrene sheet is substantially uniformly disposed throughout the article.
Claim 3
Dependent Claim
14 words
The substantially non-porous article set forth in claim 1 wherein: said wax is unpigmented.
Claim 4
Dependent Claim
14 words
The substantially non-porous article set forth in claim 1 wherein: said wax is pigmented.
Claim 5
Dependent Claim
17 words
The substantially non-porous article set forth in claim 1 wherein: said sheet is formed of interconnected beads.
Claim 6
Independent Claim
56 words
A method of preparing a substantially non-porous article comprising the steps of: impregnating a sheet of foamed polystyrene having open, connected cells under pressure with a thermosetting wax composition in liquid form, whereby said wax composition fills the open cells of the sheet, and hardening the wax composition while maintaining said sheet of polystyrene under pressure.
Claim 7
Independent Claim
56 words
A method of preparing a substantially non-porous article comprising the steps of: impregnating a sheet of foamed polystyrene having open, connected cells under pressure with a thermosetting wax composition in liquid form, whereby said wax composition fills the open cells of the sheet, and hardening the wax composition while maintaining said sheet of polystyrene under pressure.
Claim 8
Dependent Claim
20 words
The method set forth in claim 5 wherein: the wax composition substantially entirely fills the open cells of the sheet.
Claim 9
Dependent Claim
18 words
The method set forth in claim 6 wherein: said sheet of foamed polystyrene is formed of interconnected beads.
References Cited (Backward Citations)
US3661674A
Cited
US3949137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |