US4170296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-heating articles and process
Assignee: Raychem Corp
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Filing: 1974-11-25
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Granted: 1979-10-09
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Expires: 1994-11-25
Abstract
Abstract This invention relates to a heat recoverable article having a self contained heat source comprising a heat recoverable polymer and a material capable of undergoing an exothermic chemical reaction said exothermic material being attached to the outer surface of said heat recoverable polymer, wherein, the outer surface of said polymer material is enclosed in a container having separate compartments containing two materials which react to produce heat, the partition between said materials being capable of being destroyed upon the application of tension or a shearing force to provide for mixing of the materials.
Inventors
- 👤 Judson D. Wetmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:10
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/18; H02G15/1806; B; B29; B29C; B29C61/00; B29C61/06; B29C61/0608; B29C61/0625; F; F16; F16L; F16L47/00; F16L47/20; F16L47/22; G; G09; G09F; G09F3/00; B29K; B29K2023/00; B29K2027/00; B29K2027/12; B29K2075/00; Y; Y10; Y10S; Y10S215/00; Y10S215/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
92 words
A heat recoverable article of manufacture having a self contained heat source comprising a heat recoverable polymer and a material capable of undergoing an exothermic chemical reaction, said exothermic material being attached to the outer surface of said heat recoverable polymer, wherein the outer surface of said polymer material is encased in a container having separate compartments containing two materials which will react to produce heat, the partition between said materials being capable of being destroyed upon the application of tension or a shearing force to provide for mixing of the materials.
Claim 2
Dependent Claim
92 words
A heat recoverable article of manufacture having a self contained heat source comprising a heat recoverable polymer and a material capable of undergoing an exothermic chemical reaction, said exothermic material being attached to the outer surface of said heat recoverable polymer, wherein the outer surface of said polymer material is encased in a container having separate compartments containing two materials which will react to produce heat, the partition between said materials being capable of being destroyed upon the application of tension or a shearing force to provide for mixing of the materials.
Claim 3
Dependent Claim
36 words
The article of claim 1 wherein one of said separate compartments contains said exothermic material and the other of said separate compartments contains water, which will react together to produce heat upon destruction of said partition.
Claim 4
Dependent Claim
12 words
The article of claim 2 wherein said exothermic material is aluminum chloride.
Claim 5
Dependent Claim
12 words
The article of claim 2 wherein said exothermic material is ammonium chloride.
Claim 6
Dependent Claim
20 words
The article of claim 2 wherein said exothermic material is a mixture of ammonium chloride, cupric oxide, iron and alum.
Claim 7
Dependent Claim
10 words
The article of claim 1 wherein said polymer is crosslinked.
Claim 8
Dependent Claim
10 words
The article of claim 6 wherein said polymer is polyethylene.
Claim 9
Dependent Claim
11 words
The article of claim 6 wherein said polymer is polyvinylidene fluoride.
Claim 10
Dependent Claim
10 words
The article of claim 6 wherein said polymer is polyurethane.
Claim 11
Dependent Claim
13 words
The article of claim 1 wherein said article is a heat recoverable tube.
Claim 12
Dependent Claim
80 words
A heat recoverable article of manufacture comprising a heat recoverable tube encased within a plastic container having separate compartments therein, one of said separate compartments containing a material capable of undergoing an exothermic chemical reaction and the other of said separate compartments containing a material capable of reaction with said first material to produce heat, and a partition between said compartments capable of being destroyed upon application of tension or a shearing force to provide for mixing of said materials.
Claim 13
Dependent Claim
80 words
A heat recoverable article of manufacture comprising a heat recoverable tube encased within a plastic container having separate compartments therein, one of said separate compartments containing a material capable of undergoing an exothermic chemical reaction and the other of said separate compartments containing a material capable of reaction with said first material to produce heat, and a partition between said compartments capable of being destroyed upon application of tension or a shearing force to provide for mixing of said materials.
Claim 14
Dependent Claim
38 words
The heat recoverable article of claim 11 wherein one of said separate compartments contains said exothermic material and the other of said separate compartments contains water which will react together to produce heat upon destruction of said partition.
Claim 15
Dependent Claim
33 words
The heat recoverable article of claim 11 wherein said exothermic material is selected from the group consisting of aluminum chloride, ammonium chloride and a mixture of ammonium chloride, cupric oxide, iron and alum.
Claim 16
Dependent Claim
18 words
The heat recoverable article of claim 11 in which said tube is formed from a heat recoverable polymer.
Claim 17
Dependent Claim
13 words
The heat recoverable article of claim 14 in which said polymer is crosslinked.
Claim 18
Dependent Claim
23 words
The heat recoverable article of claim 15 wherein said crosslinked polymer is selected from the group consisting of polyethylene, polyvinylidene fluoride and polyurethane.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |