Patent US5366756A successfully refreshed from Google Patents.
US5366756A
Expired / Lapsed
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Method for treating bioabsorbable implant material
Assignee: United States Surgical Corp
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Filing: 1992-06-15
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Granted: 1994-11-22
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Expires: 2012-06-15
Abstract
Abstract A porous bioabsorbable surgical implant material is prepared by coating particles of bioabsorbable polymer with a tissue ingrowth promoter. Typical polymers include polymers of glycolide, lactide, caprolactone, trimethylene carbonate, dioxanone and physical and chemical combinations thereof. The tissue ingrowth promoter can include calcium hydroxide and/or a hydrophillic coating material. The hydrophillic coating material can be bioabsorbable or non-bioabsorbable. A typical non-bioabsorbable hydrophillic coating material is polyhydroxymethylmethacrylate (PHEMA). The bioabsorbable implant material may also contain a therapeutic agent. Typical therapeutic agents include an antimicrobial agent, dye, growth factor and combinations thereof. Typically, the particles are prepared by rotary atomization and coated by spraying.
Inventors
- 👤 Michael P. Chesterfield
- 👤 Robert D. Torgerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:29
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/56; A61F; A61F2/00; A61F2/02; A61F2/28; A61L27/14; A61L27/18; A61L27/28; A61L27/30; A61L27/34; A61L27/58; C; C08; C08L; C08L67/00; C08L67/04; Y; Y10; Y10S; Y10S525/00; Y10S525/937; Y10S623/00; Y10S623/92; Y10S623/923
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
34 words
A process for preparing surgical implant material comprising: a) providing a quantity of particles of bioabsorbable implant material; and b) coating said particles of bioabsorbable implant material with at least one tissue ingrowth promoter.
Claim 2
Dependent Claim
34 words
A process for preparing surgical implant material comprising: a) providing a quantity of particles of bioabsorbable implant material; and b) coating said particles of bioabsorbable implant material with at least one tissue ingrowth promoter.
Claim 3
Dependent Claim
33 words
The process of claim 1, wherein said bioabsorbable implant material is a material selected from the group consisting of polymers of glycolide, lactide, caprolactone, trimethylene carbonate, dioxanone, and physical and chemical combinations thereof.
Claim 4
Dependent Claim
17 words
The process of claim 1, wherein said bioabsorbable implant material comprises a copolymer of glycolide and lactide.
Claim 5
Dependent Claim
28 words
The process of claim 1, wherein said bioabsorbable implant material contains a therapeutic agent selected from the group consisting of antimicrobial agent, dye, growth factor, and combinations thereof.
Claim 6
Dependent Claim
19 words
The process of claim 1, wherein said particles of bioabsorbable implant material are prepared by a rotary atomization process.
Claim 7
Dependent Claim
14 words
The process of claim 1, wherein said tissue ingrowth promoter comprises a hydrophilic material.
Claim 8
Dependent Claim
55 words
The process of claim 6, wherein said coating the particles of bioabsorbable implant material comprises providing a solution of a hydrophilic material in a solvent, spraying said particles with said solution, and evaporating the solvent from said particles thereby leaving a coating of hydrophilic material on the surfaces of said particles of bioabsorbable implant material.
Claim 9
Dependent Claim
45 words
The process of claim 6, wherein said coating the particles of bioabsorbable implant material comprises providing a monomeric hydrophilic coating material, coating said particles with said monomeric coating material, and then polymerizing said monomeric hydrophilic material to form a polymeric hydrophilic coating on said particles.
Claim 10
Dependent Claim
12 words
The process of claim 8, wherein said monomeric coating material includes hydroxyethylmethacrylate.
Claim 11
Dependent Claim
14 words
The process of claim 9, wherein said hydroxyethylmethacrylate is admixed with a crosslinking agent.
Claim 12
Dependent Claim
16 words
The process of claim 10, wherein said crosslinking agent is a methacrylic diester of ethylene glycol.
Claim 13
Dependent Claim
16 words
The process of claim 11, wherein said methacrylic diester of ethylene glycol is triethylene glycol dimethacrylate.
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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) | 1997-11-21 | 1998-05-23 | 1998-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-21 | 2002-05-23 | 2002-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-21 | 2006-05-23 | 2006-11-22 | $7700.00 | Window Closed / Lapsed |