Patent US4755593A successfully refreshed from Google Patents.
US4755593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel biomaterial of cross-linked peritoneal tissue
Assignee: Individual
•
Filing: 1986-07-24
•
Granted: 1988-07-05
•
Expires: 2006-07-24
Abstract
Abstract A biomaterial suitable for use in medical devices which comprises peritoneal tissue, especially animal parietal peritoneum tissue, which has been chemically treated to crosslink the collagen in the tissue.
Inventors
- 👤 Mark D. Lauren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:23
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/36; A61L27/3683; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/10; A61F2/14; A61K; A61K35/00; A61K35/12; A61L27/3604; A61L27/50; A61L27/54; C; C08; C08H; C08H1/00; C08H1/06; C09; C09H; C09H7/00; A61L2300/00; Y; Y10; Y10S; Y10S128/00; Y10S128/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
24 words
A biomaterial suitable for use in medical devices which comprises peritoneal tissue which has been chemically treated to crosslink the collagen in the tissue.
Claim 2
Dependent Claim
24 words
A biomaterial suitable for use in medical devices which comprises peritoneal tissue which has been chemically treated to crosslink the collagen in the tissue.
Claim 3
Dependent Claim
15 words
A biomaterial as claimed in claim 1, wherein the tissue is animal parietal peritoneum tissue.
Claim 4
Dependent Claim
22 words
A biomaterial as claimed in claim 1, which comprises peritoneal tissue treated in accordance with claim 1, bonded to a synthetic substrate.
Claim 5
Independent Claim
34 words
A method for processing animal peritoneal tissue into biomaterial suitable for use in medical devices, wherein the tissue is chemically treated to crosslink the collagen and make the tissue stable, less antigenic, and sterile.
Claim 6
Independent Claim
34 words
A method for processing animal peritoneal tissue into biomaterial suitable for use in medical devices, wherein the tissue is chemically treated to crosslink the collagen and make the tissue stable, less antigenic, and sterile.
Claim 7
Dependent Claim
19 words
A method as claimed in claim 4, wherein the tissue is treated with a tanning agent to effect crosslinking.
Claim 8
Dependent Claim
25 words
A method as claimed in claim 5, wherein the tanning agent is selected from the group consisting of glutaraldehyde, formaldehyde, carbodiimides, diisocyanates, and adipic dialdehyde.
Claim 9
Dependent Claim
13 words
A method as claimed in claim 5, wherein the tanning agent is glutaraldehyde.
Claim 10
Dependent Claim
21 words
A method as claimed in claim 7, wherein the tissue is treated with a diamine in addition to the glutaraldehyde treatment.
Claim 11
Dependent Claim
16 words
A method as claimed in claim 5, wherein the tissue is sterilized after the crosslinking treatment.
Claim 12
Dependent Claim
24 words
A method as claimed in claim 9, wherein sterilization is effected by treatment with (a) formaldehyde, (b) ethylene or propylene oxide, or (c) radiation.
Claim 13
Dependent Claim
37 words
A method for producing a biomaterial as claimed in claim 3, which comprises lyophilizing the crosslinked tissue and applying a solution of a polymer in an organic solvent to the tissue and allowing the solvent to evaporate.
Claim 14
Dependent Claim
26 words
A method as claimed in claim 11, wherein multiple applications of the polymer solution are made, the solvent being allowed to completely evaporate after such application.
Claim 15
Dependent Claim
28 words
A biomaterial as claimed in claim 3 wherein the synthetic substrate is a polymer which is bonded to and penetrates in the non-mesothelial surface of the peritoneal tissue.
References Cited (Backward Citations)
US4280954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |