Patent US4891165A successfully refreshed from Google Patents.
US4891165A
Expired / Lapsed
US
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Device and method for encapsulating radioactive materials
Assignee: Cordis Corp
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Filing: 1988-07-28
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Granted: 1990-01-02
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Expires: 2008-07-28
Abstract
Abstract A capsule for encapsulating radioactive material for radiation treatment comprising two or more interfitting sleeves, wherein each sleeve comprises a closed bottom portion having a circumferential wall extending therefrom, and an open end located opposite the bottom portion. The sleeves are constructed to fit over one another to thereby establish an effectively sealed capsule structure.
Inventors
- 👤 Krishnan Suthanthiran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:51
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/20; G21F9/24; G21G; G21G4/00; G21G4/04; G21G4/06; G21G4/08; A; A61; A61N; A61N5/00; A61N5/10; A61N5/1001; A61N5/1027; G21F9/06; G21F9/12; G21F9/28; G21F9/34; G21F9/36; A61N2005/1019; A61N2005/1024
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
108 words
A small, metallic capsule for encapsulating radioactive materials for medical and industrial diagnostic, therapeutic and functional applications, comprising: at least first and second metallic sleeves, each of said sleeves comprising a bottom portion having a circumferential wall extending therefrom, and having an open and opposite said bottom portion; wherein said first sleeve has an outer surface which is complementary to and substantially the same size as the inner surface of said second sleeve, said second sleeve fitting snugly over the open end of said first sleeve, thereby forming a substantially sealed, closed capsule, having an inner cavity, with substantially uniform total wall thickness permitting substantially uniform radiation therethrough.
Claim 2
Dependent Claim
108 words
A small, metallic capsule for encapsulating radioactive materials for medical and industrial diagnostic, therapeutic and functional applications, comprising: at least first and second metallic sleeves, each of said sleeves comprising a bottom portion having a circumferential wall extending therefrom, and having an open and opposite said bottom portion; wherein said first sleeve has an outer surface which is complementary to and substantially the same size as the inner surface of said second sleeve, said second sleeve fitting snugly over the open end of said first sleeve, thereby forming a substantially sealed, closed capsule, having an inner cavity, with substantially uniform total wall thickness permitting substantially uniform radiation therethrough.
Claim 3
Dependent Claim
10 words
The capsule of claim 1, wherein said sleeves are cylindrical.
Claim 4
Dependent Claim
37 words
The capsule of claim 1 wherein said sleeves comprise a material selected from the group consisting of titanium, stainless steel, platinum, gold, tantalum, and copper or aluminum alloys, said copper and aluminum alloys having a protective coating.
Claim 5
Dependent Claim
21 words
The capsule of claim 1 wherein said sleeves comprise a material selected from the group consisting of titanum and stainless steel.
Claim 6
Dependent Claim
22 words
The capsule of claim 1 wherein the wall of said inner sleeve extends substantially to the bottom portion of said second sleeve.
Claim 7
Dependent Claim
72 words
The capsule of claim 1, further comprising a third sleeve comprising a bottom portion having a circumferential wall extending therefrom, and having an open end opposite to said bottom portion of said third sleeve wherein and third sleeve has an inner surface which is complementary to and substantially the same size as the outer surface of said second sleeve, said third sleeve fitting snugly over the open end of said second sleeve.
Claim 8
Dependent Claim
71 words
The capsule of claim 6, further comprising a fourth sleeve comprising a bottom portion having a circumferential wall extending therefrom, and having an open end opposite said bottom portion of said fourth sleeve, wherein said fourth sleeve has an inner surface which is complementary to and substantially the same size as the outer surface of said third sleeve, said fourth sleeve fitting snugly over the open end of said third sleeve.
Claim 9
Dependent Claim
46 words
The capsule of claim 7, wherein the length of the wall of said second sleeve is longer than the length of the wall of said first sleeve by a distance which is about the same as the thickness of the bottom portion of said first sleeve.
Claim 10
Dependent Claim
46 words
The capsule of claim 7, wherein the length of the wall of said third sleeve is longer than the length of the wall of said second sleeve by a distance which is about the same as the thickness of the bottom portion of said second sleeve.
Claim 11
Dependent Claim
46 words
The capsule of claim 7, wherein the length of the wall of said fourth sleeve is longer than the length of the wall of said third sleeve by a distance which is about the same as the thickness of the bottom portion of said third sleeve.
Claim 12
Dependent Claim
34 words
The capsule of claim 1, wherein the thickness of the bottom portion of each sleeve is in the range of about 1 to 2 times the thickness of the wall portions of each sleeve.
Claim 13
Dependent Claim
20 words
The capsule of claim 1, wherein the lengths of said sleeves ranges from about 1.0 mm to about 25.0 mm.
Claim 14
Dependent Claim
20 words
The capsule of claim 6, wherein the lengths of said sleeves range from about 1.0 mm to about 25.0 mm.
Claim 15
Dependent Claim
20 words
The capsule of claim 7, wherein the lengths of said sleeves range from about 1.0 mm to about 25.0 mm.
Claim 16
Dependent Claim
23 words
The capsule of claim 1, wherein the thickness of circumferential walls of said sleeves ranges from about 0.2 mm to about 2.0 mm.
Claim 17
Dependent Claim
24 words
The capsule of claim 1, wherein the thickness of the bottom portions of said sleeves ranges from about 0.2 mm to about 3.0 mm.
Claim 18
Dependent Claim
20 words
The capsule of claim 1, wherein the width of said sleeves range from about 0.25 mm to about 25.0 mm.
Claim 19
Dependent Claim
20 words
The capsule of claim 6, wherein the width of said sleeves range from about 0.25 mm to about 25.0 mm.
Claim 20
Dependent Claim
20 words
The capsule of claim 7, wherein the width of said sleeves range from about 0.25 mm to about 25.0 mm.
Claim 21
Dependent Claim
15 words
The capsule of claim 1, wherein the sleeves are further connected by welding or adhesive.
Claim 22
Dependent Claim
15 words
The capsule of claim 6, wherein the sleeves are further connected by welding or adhesive.
Claim 23
Dependent Claim
15 words
The capsule of claim 7, wherein the sleeves are further connected by welding or adhesive.
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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) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |