US4371998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid flotation mattress having protecting, water proof liner
Assignee: Dreamwell Ltd
•
Filing: 1980-12-31
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Granted: 1983-02-08
•
Expires: 2000-12-31
Abstract
Abstract A hybrid flotation mattress of the type having a center water bag surrounded by at least one row of resilient bedding material is provided. A protective water resistant liner is further provided between the water bag and the resilient material as is a bridge liner on the top surface of the mattress, extending inwardly from the resilient material over the interface between the resilient material and the water bag.
Inventors
- 👤 Milton A. Callaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:09
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/08; A47C27/085; A47C27/04; A47C27/06; A47C27/063; A47C27/064; Y; Y10; Y10S; Y10S5/00; Y10S5/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A hybrid flotation mattress comprising: a perimeter of resilient bedding material defining a central cavity; a water bag positioned within said central cavity; a first protective liner extending over said perimeter of resilient bedding material, between said perimeter and said water bag, and underlying said water bag; a second protective liner enveloping said perimeter, said water bag, and said first protective liner, a portion of said second protective liner extending over the peripheral portions of said water bag and defining an opening allowing access to said water bag, said second protective liner being sealed to said first protective liner above said perimeter of resilient bedding material thereby preventing any leakage from said water bag from reaching said perimeter.
Claim 2
Dependent Claim
118 words
A hybrid flotation mattress comprising: a perimeter of resilient bedding material defining a central cavity; a water bag positioned within said central cavity; a first protective liner extending over said perimeter of resilient bedding material, between said perimeter and said water bag, and underlying said water bag; a second protective liner enveloping said perimeter, said water bag, and said first protective liner, a portion of said second protective liner extending over the peripheral portions of said water bag and defining an opening allowing access to said water bag, said second protective liner being sealed to said first protective liner above said perimeter of resilient bedding material thereby preventing any leakage from said water bag from reaching said perimeter.
References Cited (Backward Citations)
US3735432A
Cited
US4187566A
Cited
US4145780A
Cited
US4193151A
Cited
US4245362A
Cited
US4245364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |