Patent US5534020A successfully refreshed from Google Patents.
US5534020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instant reusable compress
Assignee: Individual
•
Filing: 1995-06-28
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Granted: 1996-07-09
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Expires: 2015-06-28
Abstract
Abstract An instant reusable gel compress for applying cold or heat to a human or animal body part. The compress contains crystals of ammonium nitrate or calcium chloride, a water soluble acrylic polymer and an enclosed bag of water within a sealed, durable, flexible, plastic, bag-like container. When the interior water bag is broken, an immediate thermal reaction and simultaneous gel formation results. The resulting gel compress is then applied to the body part for cold or heat treatment. When the cold or heat is dissipated the gel compress itself may be chilled or heated again by an external source and then reused.
Inventors
- 👤 Henry H. Cheney, III
- 👤 Michael Vecchione
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:45
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F7/03; A61F2007/0203; A61F2007/0206; A61F2007/0209; A61F2007/0214; A61F2007/0268; A61F2007/0276; A61F7/10; A61F7/106; Y; Y10; Y10S; Y10S383/00; Y10S383/901
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
100 words
An instant reusable cold gel compress used for cooling a human or animal body part comprising: a durable flexible outer container; an interior breakable envelope contained within said flexible outer container; water contained within said interior envelope; a water soluble acrylic polymer contained within said flexible outer container; an inorganic salt with a negative heat of solution contained within said flexible outer container; wherein when said interior envelope is broken thereby releasing water into said flexible outer container, said water will dissolve said inorganic salt and hydrate said water soluble acrylic polymer, thereby forming a gel while cooling said gel.
Claim 2
Dependent Claim
100 words
An instant reusable cold gel compress used for cooling a human or animal body part comprising: a durable flexible outer container; an interior breakable envelope contained within said flexible outer container; water contained within said interior envelope; a water soluble acrylic polymer contained within said flexible outer container; an inorganic salt with a negative heat of solution contained within said flexible outer container; wherein when said interior envelope is broken thereby releasing water into said flexible outer container, said water will dissolve said inorganic salt and hydrate said water soluble acrylic polymer, thereby forming a gel while cooling said gel.
Claim 3
Dependent Claim
23 words
An instant reusable cold gel compress as recited in claim 1, wherein: said water soluble acrylic polymer is a crosslinked modified acrylic polymer.
Claim 4
Dependent Claim
18 words
An instant reusable cold gel compress as recited in claim 2, wherein: said inorganic salt is ammonium nitrate.
Claim 5
Dependent Claim
22 words
An instant reusable cold gel compress as recited in claim 3, further comprising: a thickening agent contained within said flexible outer container.
Claim 6
Dependent Claim
17 words
An instant reusable cold gel compress as recited in claim 4, wherein: said thickening agent is trisaminothane.
Claim 7
Dependent Claim
62 words
An instant reusable cold gel compress as recited in claim 5, wherein: said flexible outer container contains 0.15 to 1.2 ounces of said crosslinked modified acrylic polymer in grains of 50 to 4000 microns in diameter, 1 to 8 ounces of ammonium nitrate, and 1 to 2 cc of trisaminothane; and said interior breakable envelope contains 1 to 8 ounces of water.
Claim 8
Dependent Claim
102 words
An instant reusable hot gel compress used for applying warmth to a human or animal body part comprising: a durable flexible outer container; an interior breakable envelope contained within said flexible outer container; water contained within said interior envelope; a water soluble acrylic polymer contained within said flexible outer container; an inorganic salt with a positive heat of solution contained within said flexible outer container; wherein when said interior envelope is broken thereby releasing water into said flexible outer container, said water will dissolve said inorganic salt and hydrate said water soluble acrylic polymer, thereby forming a gel while warming said gel.
Claim 9
Dependent Claim
102 words
An instant reusable hot gel compress used for applying warmth to a human or animal body part comprising: a durable flexible outer container; an interior breakable envelope contained within said flexible outer container; water contained within said interior envelope; a water soluble acrylic polymer contained within said flexible outer container; an inorganic salt with a positive heat of solution contained within said flexible outer container; wherein when said interior envelope is broken thereby releasing water into said flexible outer container, said water will dissolve said inorganic salt and hydrate said water soluble acrylic polymer, thereby forming a gel while warming said gel.
Claim 10
Dependent Claim
23 words
An instant reusable hot gel compress as recited in claim 7, wherein: said water soluble acrylic polymer is a crosslinked modified acrylic polymer.
Claim 11
Dependent Claim
18 words
An instant reusable hot gel compress as recited in claim 8, wherein: said inorganic salt is calcium chloride.
Claim 12
Dependent Claim
22 words
An instant reusable hot gel compress as recited in claim 9, further comprising: a thickening agent contained within said flexible outer container.
Claim 13
Dependent Claim
17 words
An instant reusable hot gel compress as recited in claim 10, wherein: said thickening agent is trisaminothane.
Claim 14
Dependent Claim
62 words
An instant reusable hot gel compress as recited in claim 11, wherein: said flexible outer container contains 0.3 to 0.6 ounces of said crosslinked modified acrylic polymer in grains of 50 to 4000 microns in diameter, 2 to 4 ounces of calcium chloride, and 0.5 to 1 cc of trisaminothane; and said interior breakable envelope contains 1 to 6 ounces of water.
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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) | 1999-07-09 | 2000-01-08 | 2000-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-09 | 2004-01-08 | 2004-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-09 | 2008-01-08 | 2008-07-09 | $7700.00 | Window Closed / Lapsed |