Patent US5360830A successfully refreshed from Google Patents.
US5360830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanded articles of biodegradable plastic materials
Assignee: Novamont SpA
•
Filing: 1994-02-18
•
Granted: 1994-11-01
•
Expires: 2014-02-18
Abstract
Abstract Expanded articles of biodegradable plastic material having a closed pore structure and a density of from 0.01 to less than 0.1 g/cm 3 are produced by extrusion of a composition including starch and a synthetic polymer selected from ethylene-vinyl alcohol, ethylene-acrylic acid, and mixture thereof.
Inventors
- 👤 Catia Bastioli
- 👤 Vittorio Bellotti
- 👤 Luciano Del Giudice
- 👤 Roberto Lombi
- 👤 Angelos Rallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L3/00; C08L3/02; C08J2303/00; C08J2303/02; C08J2403/00; C08L2205/00; C08L2205/03; C08L23/0853; C08L23/0861; C08L23/0869; C08L29/00; C08L29/02; C08L29/04; Y; Y10; Y10S; Y10S521/00; Y10S521/916
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
48 words
Expanded articles of biodegradable plastic material comprising a material including starch and a synthetic polymer selected from the group consisting of ethylene-vinyl alcohol, ethylene-acrylic acid, and mixtures thereof, said articles having a closed pore structure and a density of from 0.01 to less than 0.1 g/cm 3 .
Claim 2
Dependent Claim
48 words
Expanded articles of biodegradable plastic material comprising a material including starch and a synthetic polymer selected from the group consisting of ethylene-vinyl alcohol, ethylene-acrylic acid, and mixtures thereof, said articles having a closed pore structure and a density of from 0.01 to less than 0.1 g/cm 3 .
Claim 3
Dependent Claim
32 words
Expanded articles according to claim 1, wherein the ethylene-vinyl alcohol copolymer has an ethylene content of from 10 to 40% by weight and a melt flow index of from 6 to 20.
Claim 4
Dependent Claim
36 words
Expanded articles according to claim 1, wherein the ethylene-acrylic acid copolymer is produced by the copolymerization of a mixture including from 3 to 30% by weight of acrylic acid and from 97 to 70% of ethylene.
Claim 5
Dependent Claim
23 words
Expanded articles according to claim 1, wherein the starch and the synthetic polymer are in a weight ratio of from 9:1 to 1:9.
Claim 6
Dependent Claim
24 words
Expanded articles according to claim 1, further including a polymeric acid selected from the group consisting of polyacrylic acid and ethylene-acrylic acid-vinyl alcohol copolymer.
Claim 7
Dependent Claim
20 words
Expanded articles according to claim 1, further including a filler consisting of granular pyrolized foamed starch or hollow glass microspheres.
Claim 8
Dependent Claim
10 words
Expanded articles according to claim 1, further including polyvinyl alcohol.
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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) | 1997-10-31 | 1998-05-02 | 1998-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-31 | 2002-05-02 | 2002-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-31 | 2006-05-02 | 2006-11-01 | $7700.00 | Window Closed / Lapsed |