Patent US4263681A successfully refreshed from Google Patents.
US4763642A
Expired / Lapsed
US
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Intracavitational brachytherapy
Assignee: BRUCE S HOROWITZ 494 NW 165TH STREET APT #C302 MIAMI FLORIDA 33167
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Filing: 1986-04-07
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Granted: 1988-08-16
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Expires: 2006-04-07
Abstract
Abstract A delivery system for intracavitational brachytherapy comprising a body of material which is absorbable in animal tissue and a plurality of radioactive seeds within the body and encapsulated in the body. In one form, the body comprises a hollow exterior wall with a separate central chamber such that the hollow exterior wall will accommodate growth of body tissue such as brain tissue. In another form, the body comprises a solid hollow body having the seeds held in the center of the body that can be inserted in the cavity to be treated. In another form, a flat sheet is attached tangentially to the hollow exterior wall to facilitate placement over the brain.
Inventors
- 👤 Bruce S. Horowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:02
CPC Classifications
A; A61; A61K; A61K51/00; A61K51/12; A61K51/1282; A61K9/00; A61K9/0012; A61K9/0085; A61N; A61N5/00; A61N5/10; A61N5/1001; A61N5/1014; A61K2121/00; A61N2005/1019
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
A delivery system for intracavitational brachytherapy comprising: a body of a material which is absorbable in animal tissue, said body having a completely closed geometrical shape conforming generally with a cavity which is to be treated after removal of a tumor, and a plurality of radioactive seeds that are non-absorbable within the body, said body becoming flexible due to absorption as the half-life of the radioactive sources is exceeded and diminishing in size with said cavity.
Claim 2
Dependent Claim
76 words
A delivery system for intracavitational brachytherapy comprising: a body of a material which is absorbable in animal tissue, said body having a completely closed geometrical shape conforming generally with a cavity which is to be treated after removal of a tumor, and a plurality of radioactive seeds that are non-absorbable within the body, said body becoming flexible due to absorption as the half-life of the radioactive sources is exceeded and diminishing in size with said cavity.
Claim 3
Dependent Claim
26 words
The delivery system set forth in claim 1 wherein said body is hollow and includes an exterior wall and an internal chamber containing said radioactive seeds.
Claim 4
Dependent Claim
42 words
The delivery system set forth in claim 2 wherein said plurality of radioactive seeds have a predetermined half-life and said body has sufficient flexibility such that the closed geometric shape diminishes in size as the half-life of said radioactive seeds is exceeded.
Claim 5
Dependent Claim
13 words
The delivery system set forth in claim 2 wherein said body is spherical.
Claim 6
Dependent Claim
26 words
The delivery system set forth in any of claims 1-4 wherein said body includes a removable closure for providing loading of the seeds prior to use.
Claim 7
Dependent Claim
20 words
The delivery system set forth in any of claims 1-4 including a sheet of non-absorbable material attached to said body.
Claim 8
Dependent Claim
34 words
The delivery system set forth in claim 6 wherein said body includes a removable closure for providing loading of the seeds prior to use, said closure being generally in the plane of said sheet.
Claim 9
Dependent Claim
25 words
The delivery system set forth in claim 1 wherein said plurality of radioactive seeds are spaced from the periphery of said body a predetermined distance.
Claim 10
Dependent Claim
109 words
A delivery system for intracavitational brachytherapy comprising: a plurality of radioactive seeds, that are not absorbable in animal tissue, encapsulated by a body of material that is absorbable in animal tissue, said body having a first and a second part, said first part completely encapsulating and isolating said plurality of seeds from adjacent tissue defining a cavity of a tumor, said second part retaining said plurality of seeds in a predetermined, spaced apart, fixed relation with respect to the periphery of said first part, said body diminishing in size due to absorption as the half-life of the radioactive sources is exceeded and diminishing in size along with said cavity.
Claim 11
Dependent Claim
109 words
A delivery system for intracavitational brachytherapy comprising: a plurality of radioactive seeds, that are not absorbable in animal tissue, encapsulated by a body of material that is absorbable in animal tissue, said body having a first and a second part, said first part completely encapsulating and isolating said plurality of seeds from adjacent tissue defining a cavity of a tumor, said second part retaining said plurality of seeds in a predetermined, spaced apart, fixed relation with respect to the periphery of said first part, said body diminishing in size due to absorption as the half-life of the radioactive sources is exceeded and diminishing in size along with said cavity.
Claim 12
Dependent Claim
23 words
A delivery system as claimed in claim 9 wherein said first part includes a removable closure for loading said seeds prior to use.
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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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |