US4754509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retainer sheet
Assignee: Individual
•
Filing: 1986-06-25
•
Granted: 1988-07-05
•
Expires: 2006-06-25
Abstract
Abstract A retainer sheet includes an array of pockets in which cylindrically shaped foam members are removably inserted to define a retainer structure enclosing a sleeping area. The foam units can be removed for laundering and can be positioned in abutting relationship to form a self-locking configuration.
Inventors
- 👤 Dianne J. Pollard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:08
CPC Classifications
A; A47; A47D; A47D15/00; A47D15/005; A47D15/008; A47C; A47C21/00; A47C21/08; A61; A61G; A61G7/00; A61G7/05; A61G7/0507
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
A retainer sheet adapted for covering the top surface of a base such as a mattress and for preventing a person or object resting on the mattress from falling off the edges thereof, comprising: a sheet of flexible material; elongated retainers attached to the sheet along two top edges thereof and forming a restraint in the corresponding top surface of the mattress defining a rest area on the sheet; each retainer comprising a relatively narrow elongated strip of material attached to the sheet along the length of the strip to thereby define a pocket and a relatively rigid component sized for removable insertion into the associated pocket; and wherein the combination of the sheet material and the relative cross-sectional area of each component and the associated pocket provide friction between the component and the pocket material which permits insertion and removal of the component into the pocket and provides stable positioning of the component when in the pocket.
Claim 2
Dependent Claim
158 words
A retainer sheet adapted for covering the top surface of a base such as a mattress and for preventing a person or object resting on the mattress from falling off the edges thereof, comprising: a sheet of flexible material; elongated retainers attached to the sheet along two top edges thereof and forming a restraint in the corresponding top surface of the mattress defining a rest area on the sheet; each retainer comprising a relatively narrow elongated strip of material attached to the sheet along the length of the strip to thereby define a pocket and a relatively rigid component sized for removable insertion into the associated pocket; and wherein the combination of the sheet material and the relative cross-sectional area of each component and the associated pocket provide friction between the component and the pocket material which permits insertion and removal of the component into the pocket and provides stable positioning of the component when in the pocket.
Claim 3
Dependent Claim
17 words
The retainer sheet of claim 1, said two retainers being disposed on adjacent edges of the sheet.
Claim 4
Dependent Claim
23 words
The retainer sheet of claim 1 or 2 wherein the sheet and pockets are cloth and the removable components are foam plastic cylinders.
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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) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |