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US5058563A
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Reusable warmers of the type employing a super-cooled solution and an activator
Assignee: CooperSurgical Inc
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Filing: 1990-06-15
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Granted: 1991-10-22
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Expires: 2010-06-15
Abstract
Abstract The present invention provides reusable warmers of the supersaturated solution type that are substantially free of saddlebagging. The reusable warmers comprise a flexible container, and located within the container, a supercooled salt solution, an activator for initiating crystallization of the supercooled salt solution, and a gelling agent, the gelling agent being present in sufficient quantity to convert the salt solution to a gel.
Inventors
- 👤 Charles F. Manker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F7/03; F; F28; F28D; F28D20/00; F28D20/02; F28D20/028; A61F2007/0292; Y; Y02; Y02E; Y02E60/00; Y02E60/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
In a reusable warmer employing a flexible bag-like container, a super-cooled salt solution and an activator for initiating the crystallization of said super-cooled salt solution, the improvement comprising incorporating into said super-cooled salt solution an effective amount less than about 5% by weight of a viscosity increasing agent sufficient to form a gel and substantially inhibit the flow of said super-cooled salt solution, wherein the viscosity increasing agent is a non-ionic, water-soluble hydroxyethyl cellulose polymer.
Claim 2
Dependent Claim
75 words
In a reusable warmer employing a flexible bag-like container, a super-cooled salt solution and an activator for initiating the crystallization of said super-cooled salt solution, the improvement comprising incorporating into said super-cooled salt solution an effective amount less than about 5% by weight of a viscosity increasing agent sufficient to form a gel and substantially inhibit the flow of said super-cooled salt solution, wherein the viscosity increasing agent is a non-ionic, water-soluble hydroxyethyl cellulose polymer.
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) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |