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EP0206830A2
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Microbial polysaccharide articles and methods of production
Assignee: Johnson and Johnson Hospital Services Inc
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Filing: 1986-06-26
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Granted: —
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Expires: 2006-06-26
Abstract
Abstract Laminar polysaccharide structures, e.g., laminar microbial cellulose structures, are disclosed. These structures comprise densified planiform sheets or laminae that merge into one another and together define plural regions having reduced polysaccharide microfibril density. The disclosed laminar polysaccharide structures are derived by manipulating fibrous polysaccharide pellicles produced by microorganisms such as those of the genere Acetobacter, Rhizobium, Agrobacterium, Pseudomonas, Sphaerotilus, and the like.
Inventors
- 👤 David Francis Ring
- 👤 Wilson Nashed
- 👤 Thurman Dow
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:44
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/02; A; A61; A61K; A61K8/00; A61K8/02; A61K8/0208; A61K8/18; A61K8/72; A61K8/73; A61K8/731; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61L15/40; A61Q; A61Q9/00; A61Q9/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
34 words
A self-supporting, laminar polysaccharide structure constituted by (a) densified, interconnected laminae that merge into one another and define channels therebetween and (b) polysaccharide microfibrils situated within the defined channels and connected to the laminae.
Claim 2
Dependent Claim
34 words
A self-supporting, laminar polysaccharide structure constituted by (a) densified, interconnected laminae that merge into one another and define channels therebetween and (b) polysaccharide microfibrils situated within the defined channels and connected to the laminae.
Claim 3
Dependent Claim
14 words
The laminar structure in accordance with claim 1 wherein the polysacchardie is microbial cellulose.
Claim 4
Dependent Claim
18 words
The laminar structure in accordance with claim 2, wherein the microbial polysaccharide pellicle is an Acetobacter xylinum pellicle.
Claim 5
Dependent Claim
31 words
The laminar structure in accordance with any one of claims 1 to 3 having a water content of up to about 100 times the weight of the polysaccharide constituting the structure.
Claim 6
Dependent Claim
18 words
The laminar structure in accordance with any one of claims 1 to 4, which is substantially pyrogen free.
Claim 7
Dependent Claim
34 words
The laminar structure in accordance with any one of claims 1 to 5 containing no more than about 0.1 percent by weight of protein, based on the weight of the polysaccharide constituting the structure.
Claim 8
Dependent Claim
50 words
The laminar structure in accordance with any one of claims 1 to 6, further containing water and a water-miscible, organic liquid fiber lubricant having a vapor pressure at 25°C no more than that of water; said lubricant being present in a polysaccharide-to-lubricant weight ratio of about 100 to about 0.007.
Claim 9
Dependent Claim
16 words
The laminar structure in accordance with claim 7 wherein the lubricant is a polyhydric aliphatic alcohol.
Claim 10
Dependent Claim
15 words
The laminar structure in accordance with claim 7 wherein the lubricant is a sugar alcohol.
Claim 11
Independent Claim
92 words
A method for producing a self-supporting laminar polysaccharide structure according to any one of claims 1 to 9 which compries the steps of providing a water-containing microbial polysaccharide pellicle: pressing said pellicle by laterally applied pressure to a thickness of no more than about 25 percent of the original thickness thereof so as to express at least some of the water contained therein and to effect a permanent rearrangement into lamellae of at least some of the polysaccharide strands constituting said pellicle; and thereafter releasing the laterally applied pressure on the pellicle.
References Cited (Backward Citations)
No citation records indexed.
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