US5163425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deformable cap for scalp cooling
Assignee: Individual
•
Filing: 1988-02-16
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Granted: 1992-11-17
•
Expires: 2008-02-16
Abstract
Abstract A deformable cap for scalp cooling is provided. The cap contains a cap member obtained by discharging air inside a hollow ball made of flexible material and a plurality of small pieces of high water content hydrogel contained in the cap member. The hydrogel is prepared by casting an aqueous solution of polyvinyl alcohol into a mold, cooling the cast aqueous solution to -10° C. or lower to obtain a cooled frozen mass followed either by thawing the cooled frozen mass and one to seven additional cooling and thawing operations or by partially dehydrating the cooled frozen mass in vacuum.
Inventors
- 👤 Masao Nambu
- 👤 Masaru Fuji
- 👤 Yoko Motizuki
- 👤 Takashi Tsujino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:37
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/10; A42; A42B; A42B1/00; A42B1/008; A61F2007/0001; A61F2007/0002; A61F2007/0008
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
A deformable ball for use in forming a cap member for cooling a patient's skull, which comprises: an inflated ball of flexible material; sealable port means in said ball for introducing small pieces of a cooling substance into said ball; sealable venting means for removing air from said ball, said ball being dimensioned so that when deformed to the shape of a cap, the cap fits about the patient's skull and contains the pieces of cooling substance around its periphery; and a band for wrapping the cap about and intimately securing the cap to the skull.
Claim 2
Dependent Claim
96 words
A deformable ball for use in forming a cap member for cooling a patient's skull, which comprises: an inflated ball of flexible material; sealable port means in said ball for introducing small pieces of a cooling substance into said ball; sealable venting means for removing air from said ball, said ball being dimensioned so that when deformed to the shape of a cap, the cap fits about the patient's skull and contains the pieces of cooling substance around its periphery; and a band for wrapping the cap about and intimately securing the cap to the skull.
Claim 3
Dependent Claim
17 words
The deformable ball according to claim 1, wherein the port means and venting means are the same.
Claim 4
Dependent Claim
15 words
The deformable ball of claim 1, wherein the cooling substance is a high water-content hydrogel.
Claim 5
Independent Claim
63 words
A method of forming a cooling cap over the skull of a patient in need thereof, which comprises: injecting pieces of a cooling substance into a deformable ball through a port means; removing air from the ball through venting means to form a cap; positioning the pieces of cooling substance around the periphery of the cap; and sealing the port and venting means.
Claim 6
Independent Claim
63 words
A method of forming a cooling cap over the skull of a patient in need thereof, which comprises: injecting pieces of a cooling substance into a deformable ball through a port means; removing air from the ball through venting means to form a cap; positioning the pieces of cooling substance around the periphery of the cap; and sealing the port and venting means.
Claim 7
Dependent Claim
24 words
A method according to claim 4 wherein 0.3 to 3 kg of small pieces of high water content hydrogel are accommodated within the cap.
Claim 8
Dependent Claim
24 words
A method according to claim 4 wherein each of the pieces of said cooling substance has a diameter of 2 mm to 3 cm.
Claim 9
Dependent Claim
25 words
A method according to claim 4 further including the step of wrapping a band about the cap and intimately securing the cap to the skull.
Claim 10
Dependent Claim
15 words
The method of claim 4 wherein the port means and venting means are the same.
Claim 11
Dependent Claim
14 words
The method of claim 4 ,wherein the cooling substance is a high water-content hydrogel.
Claim 12
Dependent Claim
39 words
The method of claim 4, wherein the cooling substance consists of small pieces of high water content hydrogel filler and wherein the cap is deformed to the shape of the patient's skull by finger pressure on the filler pieces.
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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) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |