Patent US4520517A successfully refreshed from Google Patents.
US4520517A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mattress or pillow construction
Assignee: TIMMELE LAMINERING A CORP OF SWEDEN AB
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Filing: 1982-06-24
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Granted: 1985-06-04
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Expires: 2002-06-24
Abstract
Abstract A mattress or pillow for hospital use generally consisting of a core of parallel-epipedic shape formed of elastic plastic having open cells, a layer of elastic plastic having open cells secured by heat-lamination to said core but having a shorter solidification time than the core. Said construction then being entirely covered by a protective film formed of a plastic which is heat-laminated to the layer of elastic plastic and which is easy to clean and disinfect.
Inventors
- 👤 Lars Ahlm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:08
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; A; A47; A47C; A47C27/00; A47C27/14; A47C27/15; A47G; A47G9/00; B32B27/00; B32B27/06; B32B27/065; B32B27/08; B32B27/36; B32B27/40; B32B38/00; B32B38/0036; B32B38/004; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/06; B32B2307/00; B32B2307/50; B32B2307/51; B32B2375/00; Y; Y10; Y10S; Y10S297/00; Y10S297/01; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/239; Y10T428/249921; Y10T428/249953; Y10T428/249981
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
A mattress, pillow, or the like, having a core formed of an elastic plastic material having a predominant portion of open cells, a thin layer of soft elastic plastic polyester material having predominately open cells and a short curing time said plastic thin layer completely covering said core and being permanently joined to said core by means of heat-lamination and necessitating minimum solidification time, a polyurethane plastic film which is easy to disinfect and clean, entirely covering and permanently fixed by heat-lamination to said thin layer of soft elastic plastic.
Claim 2
Dependent Claim
90 words
A mattress, pillow, or the like, having a core formed of an elastic plastic material having a predominant portion of open cells, a thin layer of soft elastic plastic polyester material having predominately open cells and a short curing time said plastic thin layer completely covering said core and being permanently joined to said core by means of heat-lamination and necessitating minimum solidification time, a polyurethane plastic film which is easy to disinfect and clean, entirely covering and permanently fixed by heat-lamination to said thin layer of soft elastic plastic.
Claim 3
Dependent Claim
28 words
A mattress, pillow, or the like as defined in claim 1 wherein said thin layer of soft elastic plastic has a thickness of from 1.42 to 4 mm.
References Cited (Backward Citations)
GB1427619A
Cited
GB2045073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |