US5502116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biodegradable copolymers and plastic articles comprising biodegradable copolymers of 3-hydroxyhexanoate
Assignee: Meredian Bioplastics Inc
•
Filing: 1995-06-07
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Granted: 1996-03-26
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Expires: 2015-06-07
Abstract
Abstract The present invention relates to biodegradable PHA copolymers comprising at least two randomly repeating monomer units (RRMU) wherein the first RRMU has the structure ##STR1## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second RRMU has the structure ##STR2## and wherein at least 50% of the RRMUs have the structure of the first RRMU. The present invention further relates to plastic articles comprising said biodegradable PHA copolymers. The present invention further relates to an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet comprising a film comprising a PHA of the present invention and an absorbent core positioned between the topsheet and the backsheet.
Inventors
- 👤 Isao Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:18
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/62; B29; B29B; B29B7/00; B29B7/80; B29B7/88; B29B7/90; B29B7/92; C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08J; C08J5/00; C08J5/18; C08L; C08L67/00; C08L67/04; C09; C09J; C09J167/00; C09J167/04; C08J2367/00; C08J2367/04; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/24785; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
76 words
A plastic article comprising a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR9## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit has the structure ##STR10## and wherein at lust 50% of the randomly repeating monomer units have the structure of the first randomly repeating monomer unit.
Claim 2
Dependent Claim
76 words
A plastic article comprising a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR9## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit has the structure ##STR10## and wherein at lust 50% of the randomly repeating monomer units have the structure of the first randomly repeating monomer unit.
Claim 3
Dependent Claim
13 words
The plastic article of claim 1, wherein the plastic article is a film.
Claim 4
Dependent Claim
17 words
The plastic article of claim 2, wherein R 1 is C 2 alkyl and n is 1.
Claim 5
Dependent Claim
15 words
The plastic article of claim 2, wherein R 1 is H and n is 1.
Claim 6
Dependent Claim
15 words
The plastic article of claim 2, wherein R 1 is H and n is 2.
Claim 7
Dependent Claim
68 words
The plastic article of claim 2, wherein the copolymer comprises one or more additional randomly repeating monomer units having the structure ##STR11## wherein R 2 is H, or a C 1 -C 19 alkyl or alkenyl; and m is 1 or 2; and wherein the additional randomly repeating monomer units are not the same as the first randomly repeating monomer unit or the second randomly repeating monomer unit.
Claim 8
Dependent Claim
18 words
The plastic article of claim 6, wherein R 1 is a C 2 alkyl and m is 1.
Claim 9
Dependent Claim
15 words
The plastic article of claim 6, wherein R 1 is H and m is 1.
Claim 10
Dependent Claim
15 words
The plastic article of claim 6, wherein R 1 is H and m is 2.
Claim 11
Dependent Claim
13 words
The plastic article of claim 1, wherein the plastic article is a sheet.
Claim 12
Dependent Claim
13 words
The plastic article of claim 1, wherein the plastic article is a fiber.
Claim 13
Dependent Claim
13 words
The plastic article of claim 1, wherein the plastic article is a foam.
Claim 14
Dependent Claim
14 words
The plastic article of claim 1, wherein the plastic article is a molded article.
Claim 15
Dependent Claim
13 words
The plastic article of claim 1, wherein the plastic article is an elastomer.
Claim 16
Dependent Claim
13 words
The plastic article of claim 1, wherein the plastic article is an adhesive.
Claim 17
Dependent Claim
67 words
The plastic article of claim 1, wherein copolymer comprises one or more additional randomly repeating monomer units having the structure ##STR12## wherein R 2 is H, or a C 1 -C 19 alkyl or alkenyl; and m is 1 or 2; and wherein the additional randomly repeating monomer units are not the same as the first randomly repeating monomer unit or the second randomly repeating monomer unit.
Claim 18
Dependent Claim
125 words
A biodegradable copolymer comprising at least three randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR13## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit has the structure ##STR14## and the third randomly repeating monomer unit has the structure ##STR15## wherein R 2 is H, or a C 1 -C 19 alkyl or alkenyl; and m is 1 or 2; and wherein the third randomly repeating monomer unit is not the same as the first randomly repeating monomer unit or the second randomly repeating monomer unit; and wherein at least 50% of the randomly repeating monomer units have the structure of the first randomly repeating monomer unit.
Claim 19
Dependent Claim
125 words
A biodegradable copolymer comprising at least three randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR13## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit has the structure ##STR14## and the third randomly repeating monomer unit has the structure ##STR15## wherein R 2 is H, or a C 1 -C 19 alkyl or alkenyl; and m is 1 or 2; and wherein the third randomly repeating monomer unit is not the same as the first randomly repeating monomer unit or the second randomly repeating monomer unit; and wherein at least 50% of the randomly repeating monomer units have the structure of the first randomly repeating monomer unit.
Claim 20
Dependent Claim
18 words
The biodegradable copolymer of claim 17, wherein R 1 is a C 2 alkyl and n is 1.
Claim 21
Dependent Claim
15 words
The biodegradable copolymer of claim 17, wherein R 1 is H and n is 1.
Claim 22
Dependent Claim
15 words
The biodegradable copolymer of claim 17, wherein R 1 is H and n is 2.
Claim 23
Dependent Claim
74 words
The biodegradable copolymer of claim 17, wherein the biodegradable copolymer comprises one or more additional randomly repeating monomer units having the structure ##STR16## wherein R 2 is H, or a C 1 -C 19 alkyl or alkenyl; and m is 1 or 2; wherein the additional randomly repeating monomer units are not the same as the first randomly repeating monomer unit, the second randomly repeating monomer unit, or the third randomly repeating monomer unit.
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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) | 1999-03-26 | 1999-09-25 | 2000-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-26 | 2003-09-25 | 2004-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-26 | 2007-09-25 | 2008-03-26 | $7700.00 | Window Closed / Lapsed |