Patent US4327733A successfully refreshed from Google Patents.
US4327733A
Expired / Lapsed
US
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Cryoenucleation tool
Assignee: University of Toronto
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Filing: 1981-01-28
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Granted: 1982-05-04
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Expires: 2001-01-28
Abstract
Abstract A cryoenucleating device is provided for freezing a melanoma tumor in an eyeball and for removing the eyeball. The device comprises a spoon, the bowl of which is formed of thermally insulating material to conform with the contours of an average eyeball. A refrigerating loop is provided, supported in the concavity of the spoon bowl to freeze the tumor while the thickness of the bowl insulates adjacent tissue from freezing.
Inventors
- 👤 Brenda L. Gallie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/02; A61B2018/00053; A61B2018/00059; A61B2018/00089; A61B2018/00101
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
Apparatus for cryoenucleating a tumor of the eye comprising: a spoon of thermally insulating material having a handle and a concave bowl and adapted to receive an eyeball, and a refrigerating loop supported on the concave side of the bowl and of a size adapted to substantially surround a tumor in said eyeball thereby to freeze it, means being provided to circulate refrigerant in passage means of said loop.
Claim 2
Dependent Claim
69 words
Apparatus for cryoenucleating a tumor of the eye comprising: a spoon of thermally insulating material having a handle and a concave bowl and adapted to receive an eyeball, and a refrigerating loop supported on the concave side of the bowl and of a size adapted to substantially surround a tumor in said eyeball thereby to freeze it, means being provided to circulate refrigerant in passage means of said loop.
Claim 3
Dependent Claim
16 words
Apparatus as claimed in claim 1 in which the spoon is formed from silicon plastics material.
Claim 4
Dependent Claim
19 words
Apparatus as claimed in claim 1 in which the refrigerating loop is a tube formed from silicon plastics material.
Claim 5
Dependent Claim
33 words
Apparatus as claimed in claim 1 in which the passage means of said loop is adapted to be connected to a source of liquid nitrogen as refrigerant and circulatable in said passage means.
Claim 6
Dependent Claim
22 words
Apparatus as claimed in claim 1 in which the loop is located in a recess in the concavity of the spoon bowl.
Claim 7
Dependent Claim
49 words
Apparatus as claimed in claim 1 in which a source of refrigerant is connected to the loop by connecting means passing coaxially through the handle of the spoon and refrigerant is vented to the atmosphere from the loop by passage means coaxially passing through the handle of the spoon.
References Cited (Backward Citations)
US2129987A
Cited
FR1512302A
Cited
FR1552671A
Cited
GB1289103A
Cited
US3674031A
Cited
US3712306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |