US4349498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio-opaque markers for pyrolytic carbon prosthetic members
Assignee: Carbomedics Inc
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Filing: 1981-01-16
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Granted: 1982-09-14
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Expires: 2001-01-16
Abstract
Abstract Methods are provided for fully encasing radio-opaque markers in pyrocarbon prosthetic members. Inserts having a pyrolytic carbon portion joined to a radio-opaque marker are affixed to a mandrel surface so that the marker extends thereabove. Pyrocarbon sufficient to encase the marker is deposited on the mandrel, the mandrel is removed, and the deposited layer of pyrocarbon is finished to form the prosthetic member.
Inventors
- 👤 Willard H. Ellis
- 👤 Axel D. Haubold
- 👤 Victor Slivenko
- 👤 Jack C. Bokros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:04
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61B; A61B90/00; A61B90/39; A61F2/24; A61F2/2403; A61F2/2409; A61L; A61L27/00; A61L27/02; A61L27/08; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/3008; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098; A61F2310/00; A61F2310/00005; A61F2310/00161
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
A method of forming a pyrolytic carbon prosthetic member having a marker fully encased in pyrolytic carbon comprising; forming a mandrel having a surface on which the member is to be created, providing an insert having a pyrolytic carbon portion and a marker joined thereto, affixing said insert to said mandrel so that said marker extends above said surface, and depositing pyrolytic carbon on said mandrel to a desired thickness sufficient to fully encase said marker therein, removing undesired portions of said mandrel, and finishing the shaping of said deposited pyrolytic carbon to form a prosthetic member.
Claim 2
Independent Claim
97 words
A method of forming a pyrolytic carbon prosthetic member having a marker fully encased in pyrolytic carbon comprising; forming a mandrel having a surface on which the member is to be created, providing an insert having a pyrolytic carbon portion and a marker joined thereto, affixing said insert to said mandrel so that said marker extends above said surface, and depositing pyrolytic carbon on said mandrel to a desired thickness sufficient to fully encase said marker therein, removing undesired portions of said mandrel, and finishing the shaping of said deposited pyrolytic carbon to form a prosthetic member.
Claim 3
Dependent Claim
11 words
A method according to claim 1 wherein said marker is radio-opaque.
Claim 4
Dependent Claim
19 words
A method according to claim 1 wherein said marker is vapor deposited on a surface of said carbon portion.
Claim 5
Dependent Claim
15 words
A method according to claim 1 wherein said prosthetic member is a heart valve member.
Claim 6
Dependent Claim
25 words
A method according to claim 1 including providing a cavity in said mandrel surface and securing said carbon portion of said insert in said cavity.
Claim 7
Dependent Claim
18 words
A method according to claim 1 wherein said insert is formed by depositing pyrolytic carbon on said marker.
Claim 8
Dependent Claim
23 words
A method according to claim 1 wherein said surface is substantially the mirror image of at least a portion of said prosthetic member.
Claim 9
Independent Claim
91 words
A method of forming a pyrolytic carbon prosthetic member having an elongated marker fully encased in pyrocarbon comprising; forming a mandrel having a surface on which the member is to be created, affixing spaced-apart pyrocarbon plugs to said mandrel so that portions thereof extend above said surface, supporting an elongated marker between said plugs, depositing pyrolytic carbon on said mandrel to a desired thickness sufficient to fully encase said marker therein, removing unwanted portions of said mandrel, and finishing the shaping of said deposited pyrolytic carbon to form a prosthetic member.
Claim 10
Independent Claim
91 words
A method of forming a pyrolytic carbon prosthetic member having an elongated marker fully encased in pyrocarbon comprising; forming a mandrel having a surface on which the member is to be created, affixing spaced-apart pyrocarbon plugs to said mandrel so that portions thereof extend above said surface, supporting an elongated marker between said plugs, depositing pyrolytic carbon on said mandrel to a desired thickness sufficient to fully encase said marker therein, removing unwanted portions of said mandrel, and finishing the shaping of said deposited pyrolytic carbon to form a prosthetic member.
Claim 11
Dependent Claim
22 words
A method according to claim 8 including removing a portion of said pyrolytic carbon plugs as a part of said finish shaping.
Claim 12
Dependent Claim
23 words
A method according to claim 8 wherein said surface is substantially the mirror image of at least a portion of said prosthetic member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-13 | 1986-03-15 | 1986-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-13 | 1990-03-15 | 1990-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-13 | 1994-03-15 | 1994-09-14 | $7700.00 | Window Closed / Lapsed |