US5389322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacture of biodegradable disposable container
Assignee: Individual
•
Filing: 1993-09-20
•
Granted: 1995-02-14
•
Expires: 2013-09-20
Abstract
Abstract A method for manufacture of a biodegradable disposable container, which container is biodegradable and reduces generation amount of the refuse, and prevents environmental pollution. The method comprises the steps of i) mixing 40-46 weight % of fine granular sawdust powder with 29-35 weight % of albumen and agitating, ii) mixing the result mixture with 17-23% of a potato starch and 4-6% of sodium metaphosphate and agitating, iii) compression-molding the result mixture into a container by a compression mold under the pressure of about 3 Kg/cm 2 , iv) steaming the compression-molded container in a steaming box for about 30 minutes at a temperature in the range of about 85° C.-95° C. and drying, and v) applying a resin coating to inner and outer surfaces of the container and drying.
Inventors
- 👤 Doo-hyun Kim
- 👤 Jae-il Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:02
CPC Classifications
B; B27; B27N; B27N1/00; B27N1/02; B27N1/0209; B27N5/00; B27N5/02; Y; Y10; Y10S; Y10S264/00; Y10S264/911; Y10S264/918; Y10T; Y10T428/00; Y10T428/13; Y10T428/1348
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
121 words
A method for manufacture of a biodegradable disposable container comprising the steps of: (i) mixing 40-46 weight % of fine granular sawdust powder with 29-35 weight % of a liquid protein, and agitating; (ii) mixing the resultant mixture of step (i) with 17-23% of a starch and 4-6% of sodium metaphosphate and agitating; (iii) compression-molding the resultant mixture of step (ii) into a container under a pressure of about 3 Kg/cm 2 ; (iv) steaming the container of step (iii) in a steaming box for about 30 minutes at a temperature in the range of about 85° C.-95° C., and drying; and (v) applying a resin coating to inner and outer surfaces of the resultant container of step (iv) and drying.
Claim 2
Independent Claim
121 words
A method for manufacture of a biodegradable disposable container comprising the steps of: (i) mixing 40-46 weight % of fine granular sawdust powder with 29-35 weight % of a liquid protein, and agitating; (ii) mixing the resultant mixture of step (i) with 17-23% of a starch and 4-6% of sodium metaphosphate and agitating; (iii) compression-molding the resultant mixture of step (ii) into a container under a pressure of about 3 Kg/cm 2 ; (iv) steaming the container of step (iii) in a steaming box for about 30 minutes at a temperature in the range of about 85° C.-95° C., and drying; and (v) applying a resin coating to inner and outer surfaces of the resultant container of step (iv) and drying.
Claim 3
Dependent Claim
12 words
A method according to claim 1, wherein said liquid protein is albumen.
Claim 4
Dependent Claim
13 words
A method according to claim 1, wherein said starch is a potato starch.
Claim 5
Dependent Claim
14 words
A method according to claim 1, wherein said resin coating is a urethane coating.
Claim 6
Dependent Claim
23 words
A method according to claim 1, wherein said resin coating is an epoxy coating, added with a hardener in a ratio of 1:1.
Claim 7
Independent Claim
120 words
A method for manufacture of a biodegradable disposable container comprising the steps of: (i) mixing 40-46 weight % of rice hull powder with 29-35 weight % of a liquid protein, and agitating; (ii) mixing the resultant mixture of step (i) with 17-23% of a starch and 4-6% of sodium metaphosphate and agitating; (iii) compression-molding the resultant mixture of step (ii) into a container under a pressure of about 3 Kg/cm 2 ; (iv) steaming the container of step (iii) in a steaming box for about 30 minutes at a temperature in the range of about 85° C.-95° C., and drying; and (v) applying a resin coating to inner and outer surfaces of the resultant container of step (iv) and drying.
Claim 8
Independent Claim
120 words
A method for manufacture of a biodegradable disposable container comprising the steps of: (i) mixing 40-46 weight % of rice hull powder with 29-35 weight % of a liquid protein, and agitating; (ii) mixing the resultant mixture of step (i) with 17-23% of a starch and 4-6% of sodium metaphosphate and agitating; (iii) compression-molding the resultant mixture of step (ii) into a container under a pressure of about 3 Kg/cm 2 ; (iv) steaming the container of step (iii) in a steaming box for about 30 minutes at a temperature in the range of about 85° C.-95° C., and drying; and (v) applying a resin coating to inner and outer surfaces of the resultant container of step (iv) and drying.
Claim 9
Independent Claim
120 words
A method for manufacture of a biodegradable disposable container comprising the steps of: (i) mixing 40-46 weight % of rice straw powder with 29-35 weight % of a liquid protein, and agitating; (ii) mixing the resultant mixture of step (i) with 17-23% of a starch and 4-6% of sodium metaphosphate and agitating; (iii) compression-molding the resultant mixture of step (ii) into a container under a pressure of about 3 Kg/cm 2 ; (iv) steaming the container of step (iii) in a steaming box for about 30 minutes at a temperature in the range of about 85° C.-95° C., and drying; and (v) applying a resin coating to inner and outer surfaces of the resultant container of step (iv) and drying.
Claim 10
Independent Claim
120 words
A method for manufacture of a biodegradable disposable container comprising the steps of: (i) mixing 40-46 weight % of rice straw powder with 29-35 weight % of a liquid protein, and agitating; (ii) mixing the resultant mixture of step (i) with 17-23% of a starch and 4-6% of sodium metaphosphate and agitating; (iii) compression-molding the resultant mixture of step (ii) into a container under a pressure of about 3 Kg/cm 2 ; (iv) steaming the container of step (iii) in a steaming box for about 30 minutes at a temperature in the range of about 85° C.-95° C., and drying; and (v) applying a resin coating to inner and outer surfaces of the resultant container of step (iv) and drying.
References Cited (Backward Citations)
US4244903A
Cited
US4525367A
Cited
US4393169A
Cited
US4376089A
Cited
US4376745A
Cited
US4405542A
Cited
US4386190A
Cited
US4751034A
Cited
US4889669A
Cited
US5317119A
Cited
US5206087A
Cited
US5320669A
Cited
US5288318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-02-13 | 1998-08-15 | 1999-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-13 | 2002-08-15 | 2003-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-13 | 2006-08-15 | 2007-02-14 | $7700.00 | Window Closed / Lapsed |