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US4336089A
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Method of preparing polyurethane foam carpet underlay having a barrier film attached thereto
Assignee: Dow Chemical Co
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Filing: 1981-03-30
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Granted: 1982-06-22
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Expires: 2001-03-30
Abstract
Abstract A polyurethane carpet underlay having a barrier film attached to one side is prepared employing a continuous sheet of film material which serves both as the mold for the polyurethane-forming mixture and the barrier film.
Inventors
- 👤 Dan A. Asperger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:30
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/14; B32B37/24; B29; B29C; B29C44/00; B29C44/20; B29C44/30; B32B27/00; B32B27/06; B32B27/08; B32B27/40; B32B2375/00; B32B2471/00; B32B2471/02; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A method for preparing polyurethane carpet underlay which method comprises: (A) a frothed, polyurethane-forming mixture applied onto a film material; (B) passing the film containing the frothed, polyurethane-forming mixture through a gauging device so as to provide a substantially uniform thickness of frothed polyurethane-forming mixture; (C) contacting the top of the thus gauged, frothed polyurethane-forming mixture with a film material which has been in previous contact with the bottom of said frothed polyurethane-forming mixture and which film that is in contact with the top and bottom of said frothed polyurethane-forming mixture is one continuous piece of film; (D) curing said gauged frothed polyurethane-forming mixture with said continuous piece of film on top and bottom thereof; (E) removing said film from the underside of the cured polyurethane and applying said film in a continuous manner to the top of said gauged, frothed, polyurethane-forming mixture in step (C); and (F) thereafter cutting the thus prepared carpet underlay having a film attached to one surface into desired lengths.
Claim 2
Independent Claim
165 words
A method for preparing polyurethane carpet underlay which method comprises: (A) a frothed, polyurethane-forming mixture applied onto a film material; (B) passing the film containing the frothed, polyurethane-forming mixture through a gauging device so as to provide a substantially uniform thickness of frothed polyurethane-forming mixture; (C) contacting the top of the thus gauged, frothed polyurethane-forming mixture with a film material which has been in previous contact with the bottom of said frothed polyurethane-forming mixture and which film that is in contact with the top and bottom of said frothed polyurethane-forming mixture is one continuous piece of film; (D) curing said gauged frothed polyurethane-forming mixture with said continuous piece of film on top and bottom thereof; (E) removing said film from the underside of the cured polyurethane and applying said film in a continuous manner to the top of said gauged, frothed, polyurethane-forming mixture in step (C); and (F) thereafter cutting the thus prepared carpet underlay having a film attached to one surface into desired lengths.
References Cited (Backward Citations)
US3410744A
Cited
US4056595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |