Patent US5043196A successfully refreshed from Google Patents.
US5043196A
Expired / Lapsed
US
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Biodegradable shaped products and the method of preparation thereof
Assignee: Brunob II BV
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Filing: 1989-12-05
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Granted: 1991-08-27
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Expires: 2009-12-05
Abstract
Abstract A biodegradable shaped product comprising an expanded high amylose starch product having at least 45% by weight amylose content, said expanded product having a low density, closed cell structure with good resilience and compressibility. Another embodiment provides a biodegradable packaging material comprising an expanded, low density, closed cell starch product, the starch having at least 45% by weight amylose content and the expanded product having a bulk density of less than about 2.0 lb/ft 3 , a resiliency of at least about 50%, and a compressibility of from about 100 to 800 g/cm 2 .
Inventors
- 👤 Norman L. Lacourse
- 👤 Paul A. Altieri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:14
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/125; B; B29; B29C; B29C44/00; B29C44/34; B29C44/3402; B65; B65D; B65D65/00; B65D65/38; B65D65/46; B65D65/466; C08B; C08B30/00; C08B30/20; C08L; C08L3/00; C08L3/12; C08J2303/00; C08J2303/12; Y; Y02; Y02W; Y02W90/00; Y02W90/10; Y10; Y10S; Y10S264/00; Y10S264/05; Y10T; Y10T428/00; Y10T428/13; Y10T428/1348; Y10T428/1352; Y10T428/1376
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
80 words
A biodegradable shaped product comprising an expanded, low density, closed cell, resilient and compressible starch product, wherein said starch is a modified starch having at least 45% by weight amylose content and containing about 2% or more by weight of an inorganic water soluble salt, the expanded product having a bulk density of from about 0.1 to 5 lb/ft 3 , a resiliency of at least about 20%, and a compressibility of from about 100 to 800 g/cm 2 .
Claim 2
Dependent Claim
80 words
A biodegradable shaped product comprising an expanded, low density, closed cell, resilient and compressible starch product, wherein said starch is a modified starch having at least 45% by weight amylose content and containing about 2% or more by weight of an inorganic water soluble salt, the expanded product having a bulk density of from about 0.1 to 5 lb/ft 3 , a resiliency of at least about 20%, and a compressibility of from about 100 to 800 g/cm 2 .
Claim 3
Dependent Claim
16 words
The product of claim 1 wherein the salt is an alkali or alkaline earth metal salt.
Claim 4
Dependent Claim
26 words
The product of claim 2 wherein the starch is modified with up to about 15% by weight of alkylene oxide containing 2 to 6 carbon atoms.
Claim 5
Dependent Claim
16 words
The product of claim 3 wherein the starch has at least 65% by weight amylose content.
Claim 6
Dependent Claim
30 words
The product of claim 4 wherein the starch is modified with up to about 10% by weight of propylene oxide and contains about 3% or more by weight of salt.
Claim 7
Dependent Claim
11 words
The product of claim 5 wherein the salt is sodium sulfate.
Claim 8
Dependent Claim
79 words
A biodegradable packaging material comprising an expanded, low density, closed cell, resilient and compressible starch product, wherein said starch is a modified starch having at least 45% by weight amylose content and containing about 2% or more by weight of an inorganic water soluble salt, the expanded product having a bulk density of less than about 2.0 lb/ft 3 , a resiliency of at least about 50%, and a compressibility of from about 100 to 800 g/cm 2 .
Claim 9
Dependent Claim
79 words
A biodegradable packaging material comprising an expanded, low density, closed cell, resilient and compressible starch product, wherein said starch is a modified starch having at least 45% by weight amylose content and containing about 2% or more by weight of an inorganic water soluble salt, the expanded product having a bulk density of less than about 2.0 lb/ft 3 , a resiliency of at least about 50%, and a compressibility of from about 100 to 800 g/cm 2 .
Claim 10
Dependent Claim
17 words
The packaging material of claim 5 wherein the salt is an alkali or alkaline earth metal salt.
Claim 11
Dependent Claim
17 words
The packaging material of claim 8 wherein the starch has at least 65% by weight amylose content.
Claim 12
Dependent Claim
36 words
The shaped product of claim 1 prepared by extruding the starch in the presence of a total moisture content of 21% or less by weight and at a temperature of from about 150° to 250° C.
Claim 13
Dependent Claim
35 words
The product of claim 10 wherein the starch has at least 65% by weight amylose content and is modified with up to about 15% by weight of alkylene oxide containing 2 to 6 carbon atoms.
Claim 14
Dependent Claim
16 words
The product of claim 11 wherein the salt is an alkali or alkaline earth metal salt.
Claim 15
Dependent Claim
30 words
The product of claim 12 wherein the starch is modified with up to about 10% by weight of propylene oxide and contains about 3% or more by weight of salt.
Claim 16
Dependent Claim
28 words
The product of claim 13 wherein extruded product is themoformed into a packaging product selected from the group consisting of a container, carton, sheet, tray, dish or cup.
Claim 17
Dependent Claim
40 words
The product of claim 4 wherein the expanded product has a bulk density of less than about 3.0 lb/ft 3 , a resiliency of at least about 50% and a compressibility of from about 150 to 700 g/cm 2 .
Claim 18
Dependent Claim
16 words
The product of claim 1 which is a packaging product in the form of a sheet.
Claim 19
Dependent Claim
27 words
The packaging material of claim 7 wherein the starch is modified with up to about 15% by weight of alkylene oxide containing 2 to 6 carbon atoms.
Claim 20
Dependent Claim
18 words
The packaging material of claim 9 wherein the starch contains about 3% or more by weight of salt.
Claim 21
Dependent Claim
12 words
The packaging material of claim 9 wherein the salt is sodium sulfate.
Claim 22
Dependent Claim
41 words
The packaging material of claim 9 wherein the expanded product has a bulk density of less than about 1.0 lb/ft 3 , a resiliency of at least about 60% and a compressibility of from about 150 to 700 g/m 2 .
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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) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |