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US4089498A Expired / Lapsed US ⏱️ 0.0 years remaining

12 Hour coaster

Assignee: Individual
•
Filing: 1977-02-17
•
Granted: 1978-05-16
•
Expires: 1997-02-17
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Abstract

Abstract A coaster for containers of hot or cold liquids that more effectively insulates the container from both the outer walls and base of the coaster, and that does so for longer periods of time of continuous use than known devices. Among other features, the coaster impedes the formation of condensate water on its outside walls and base, and provides an improved non-adhering adsorbent layer to receive and contain the container and receive the condensate drained from its walls.

Inventors

  • 👤 George N. Woodruff

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 02:19
CPC Classifications
A; A47; A47G; A47G23/00; A47G23/03

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 230 words
A long term coaster for removing and containing the condensate formed on the outside of glasses containing iced beverages and preventing condensate from forming on the furniture underneath the coaster or on the outside walls of the coaster itself and subsequently dripping onto the furniture comprising: a body of liquid impervious non-warpable material having a liquid impervious central well portion encircled by an uninterrupted upstanding wall portion, the central well portion being elevated above and out of contact with any supporting surface, providing a thermal insulation region underneath the well portion, said encircling wall portion including an inside wall in communication with the well portion and an outside wall portion that is disposed to provide poor thermal connection to the inside wall, an adsorbent pad of material disposed inside the well portion, that is substantially non-wettable by the condensate, substantially non-adherent to a glass or container surface whether the well contains condensate fluid or not, and substantially invarient in surface configuration and volumetric content as the well fills with condensate, said well portion and side wall portions being integrally formed of plastic material, with said inner and outer wall portions being spaced apart from one another for a distance sufficient to prevent condensate forming on the outside wall portion, and vapor impermeable means disposed beneath the well for preventing the deposit of moisture on a supporting surface beneath the coaster.
Claim 2
Dependent Claim 230 words
A long term coaster for removing and containing the condensate formed on the outside of glasses containing iced beverages and preventing condensate from forming on the furniture underneath the coaster or on the outside walls of the coaster itself and subsequently dripping onto the furniture comprising: a body of liquid impervious non-warpable material having a liquid impervious central well portion encircled by an uninterrupted upstanding wall portion, the central well portion being elevated above and out of contact with any supporting surface, providing a thermal insulation region underneath the well portion, said encircling wall portion including an inside wall in communication with the well portion and an outside wall portion that is disposed to provide poor thermal connection to the inside wall, an adsorbent pad of material disposed inside the well portion, that is substantially non-wettable by the condensate, substantially non-adherent to a glass or container surface whether the well contains condensate fluid or not, and substantially invarient in surface configuration and volumetric content as the well fills with condensate, said well portion and side wall portions being integrally formed of plastic material, with said inner and outer wall portions being spaced apart from one another for a distance sufficient to prevent condensate forming on the outside wall portion, and vapor impermeable means disposed beneath the well for preventing the deposit of moisture on a supporting surface beneath the coaster.
Claim 3
Dependent Claim 58 words
In the coaster of claim 1, said material comprising an integral member of plastic, formed with a depressed central circular well region and an upstanding annular rim having a substantially inverted U-shaped cross section, with the outside wall portion extending beyond the length of the surface supporting the coaster and provide an insulative space underneath the well portion.
Claim 4
Dependent Claim 18 words
In the coaster of claim 2, a thin layer of heat reflective material disposed underneath the well portion.
Claim 5
Dependent Claim 37 words
In the coaster of claim 2, said vapor impermeable means including thermal insulation impervious to moisture disposed underneath the well portion, to provide further thermal insulation between the well portion and any supporting surface for the coaster.
Claim 6
Dependent Claim 21 words
In the coaster of claim 4, said insulation including a heat reflecting layer and a layer of closed cell polyethylene foam.
Claim 7
Dependent Claim 41 words
In the coaster of claim 2, said vapor impermeable means including a closure member disposed underneath the well portion and attached near its periphery to the edge of the outer wall, said closure member enclosing the space beneath said well portion.
Claim 8
Dependent Claim 22 words
In the coaster of claim 6, said thermal insulation including a layer of heat reflective material and a poor heat conductive material.

References Cited (Backward Citations)

US2118326A Cited
US2652703A Cited
US2709905A Cited
US2688858A Cited
CH432746A Cited
US3836416A Cited
US3808084A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-05-15 1981-11-14 1982-05-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-05-15 1985-11-14 1986-05-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-05-15 1989-11-14 1990-05-16 $7700.00 Window Closed / Lapsed

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