Patent US4645613A successfully refreshed from Google Patents.
US4645613A
Expired / Lapsed
US
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Heat storage composition
Assignee: John D Brush and Co Inc
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Filing: 1985-07-15
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Granted: 1987-02-24
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Expires: 2005-07-15
Abstract
Abstract A heat storage composition for use as a medium to protect objects such as floppy disks from damage by heat is formed of a major portion by weight of the septahydrate of sodium carbonate and a lesser proportion by weight of the monohydrate of sodium carbonate, with the compositions being substantially free of cementitious materials and thixotropic agents.
Inventors
- 👤 Nathan A. Harvey
- 👤 Roland M. Avery, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:28
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063; Y; Y10; Y10S; Y10S165/00; Y10S165/902; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A fire-resistant storage container for protecting heat-sensitive objects that are damaged by temperatures above 125° F., a protective wall of said container having been prepared from a composition comprising the septahydrate of a salt selected from the group consisting of sodium carbonate and disodium phosphate and containing a lower hydrate of the same salt, said composition being substantially free of cementitious materials and thixotropic agents.
Claim 2
Dependent Claim
65 words
A fire-resistant storage container for protecting heat-sensitive objects that are damaged by temperatures above 125° F., a protective wall of said container having been prepared from a composition comprising the septahydrate of a salt selected from the group consisting of sodium carbonate and disodium phosphate and containing a lower hydrate of the same salt, said composition being substantially free of cementitious materials and thixotropic agents.
Claim 3
Dependent Claim
58 words
A fire-resistant safe for protecting heat-sensitive objects that are damaged by temperatures above 125° F., a protective wall of said safe having been prepared from a composition comprising about 70% by weight of the septahydrate of sodium carbonate and about 30% by weight of the monohydrate of sodium carbonate, said composition containing no cementitious materials or thixotropic agents.
Claim 4
Dependent Claim
58 words
A fire-resistant safe for protecting heat-sensitive objects that are damaged by temperatures above 125° F., a protective wall of said safe having been prepared from a composition comprising about 70% by weight of the septahydrate of sodium carbonate and about 30% by weight of the monohydrate of sodium carbonate, said composition containing no cementitious materials or thixotropic agents.
Claim 5
Dependent Claim
23 words
The fire-resistant safe of claim 2 wherein the protective wall of said safe contains said composition disposed inside an outer layer of polyurethane.
Claim 6
Dependent Claim
65 words
A heat-resistant panel for use in fire-resistant containers for protecting heat-sensitive objects that are damaged by temperatures above 125° F., said panel having been prepared from a composition comprising the septahydrate of a salt selected from the group consisting of sodium carbonate and disodium phosphate and containing a lower hydrate of the same salt, said composition being substantially free of cementitious materials and thixotropic agents.
Claim 7
Dependent Claim
65 words
A heat-resistant panel for use in fire-resistant containers for protecting heat-sensitive objects that are damaged by temperatures above 125° F., said panel having been prepared from a composition comprising the septahydrate of a salt selected from the group consisting of sodium carbonate and disodium phosphate and containing a lower hydrate of the same salt, said composition being substantially free of cementitious materials and thixotropic agents.
Claim 8
Dependent Claim
16 words
The panel of claim 4 wherein the heat-storage composition is contained within a layer of polyurethane.
Claim 9
Dependent Claim
60 words
A heat-resistant panel for use in a fire-resistant safe for protecting heat-sensitive objects that are damaged by temperatures above 125° F., said panel having been prepared from a composition comprising about 70% by weight of the septahydrate of sodium carbonate and about 30% by weight of the monohydrate of sodium carbonate, said composition containing no cementitious materials or thixotropic agents.
Claim 10
Dependent Claim
60 words
A heat-resistant panel for use in a fire-resistant safe for protecting heat-sensitive objects that are damaged by temperatures above 125° F., said panel having been prepared from a composition comprising about 70% by weight of the septahydrate of sodium carbonate and about 30% by weight of the monohydrate of sodium carbonate, said composition containing no cementitious materials or thixotropic agents.
References Cited (Backward Citations)
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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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |