US3977202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold pack device
Assignee: Johnson and Johnson
•
Filing: 1975-05-28
•
Granted: 1976-08-31
•
Expires: 1995-05-28
Abstract
Abstract A cold pack device comprising an anhydrous salt, salt hydrate and a water miscible organic liquid, wherein said components are contained in a package such that they are separated until activation is desired and upon activation the components are mixed and an endothermic reaction occurs resulting in a lowering of the temperature of the mixture to a therapeutic range and maintaining said temperature for a substantial time duration.
Inventors
- 👤 Samuel Laurence Forusz
- 👤 William Frank Vinczi
- 👤 Milton Ralph Cross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:29
CPC Classifications
F; F25; F25D; F25D5/00; F25D5/02; A; A61; A61F; A61F7/00; A61F7/10; A61F7/106; A61F7/02; A61F2007/0268; A61F2007/0276; F25D2303/00; F25D2303/08; F25D2303/085
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A method of applying cold to a part of the body comprising applying a fast activation, long duration, reusable cold pack device comprising ammonium nitrate, sodium acetate trihydrate and an aqueous solution of ethylene glycol wherein said components are separated until activation is desired but when activated by admixing, an endothermic reaction occurs resulting in a lowering of the temperature of the device.
Claim 2
Independent Claim
63 words
A method of applying cold to a part of the body comprising applying a fast activation, long duration, reusable cold pack device comprising ammonium nitrate, sodium acetate trihydrate and an aqueous solution of ethylene glycol wherein said components are separated until activation is desired but when activated by admixing, an endothermic reaction occurs resulting in a lowering of the temperature of the device.
Claim 3
Dependent Claim
107 words
A fast activation, long duration, reusable cold pack device comprising an anhydrous salt selected from the group consisting of ammonium nitrate, potassium nitrate and ammonium chloride, a salt hydrate selected from the group consisting of sodium acetate trihydrate, sodium carbonate decahydrate, sodium sulfate decahydrate, sodium thiosulfate pentahydrate and sodium phosphate dodecahydrate and a water-miscible organic liquid selected from the group consisting of alkylene glycols containing from two to four carbon atoms, wherein said anhydrous salt, salt hydrate and water-miscible organic liquid are initially separated until activation is desired but when activated by admixing, an endothermic reaction occurs resulting in a lowering of the temperature of the device.
Claim 4
Dependent Claim
107 words
A fast activation, long duration, reusable cold pack device comprising an anhydrous salt selected from the group consisting of ammonium nitrate, potassium nitrate and ammonium chloride, a salt hydrate selected from the group consisting of sodium acetate trihydrate, sodium carbonate decahydrate, sodium sulfate decahydrate, sodium thiosulfate pentahydrate and sodium phosphate dodecahydrate and a water-miscible organic liquid selected from the group consisting of alkylene glycols containing from two to four carbon atoms, wherein said anhydrous salt, salt hydrate and water-miscible organic liquid are initially separated until activation is desired but when activated by admixing, an endothermic reaction occurs resulting in a lowering of the temperature of the device.
Claim 5
Dependent Claim
14 words
The cold pack device of claim 1 wherein the anhydrous salt is ammonium nitrate.
Claim 6
Dependent Claim
15 words
The cold pack device of claim 1 wherein the salt hydrate is sodium sulfate decahydrate.
Claim 7
Dependent Claim
15 words
The cold pack device of claim 1 wherein the salt hydrate is sodium acetate trihydrate.
Claim 8
Dependent Claim
15 words
The cold pack device of claim 1 wherein the water-miscible organic liquid is ethylene glycol.
Claim 9
Dependent Claim
27 words
The cold pack device of claim 1 wherein the water miscible organic liquid is initially admixed with a suitable amount of water to form an aqueous solution.
Claim 10
Dependent Claim
50 words
A fast activation, long duration, reusable cold pack device comprising ammonium nitrate, sodium acetate trihydrate and an aqueous solution of ethylene glycol wherein said components are separated until activation is desired but when activated by admixing, an endothermic reaction occurs resulting in a lowering of the temperature of the device.
Claim 11
Dependent Claim
50 words
A fast activation, long duration, reusable cold pack device comprising ammonium nitrate, sodium acetate trihydrate and an aqueous solution of ethylene glycol wherein said components are separated until activation is desired but when activated by admixing, an endothermic reaction occurs resulting in a lowering of the temperature of the device.
References Cited (Backward Citations)
US1894775A
Cited
GB338537A
Cited
US2185799A
Cited
US2916886A
Cited
US3058313A
Cited
US3191392A
Cited
US3893834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |