US3909468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing decomposable resin moldings
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1973-09-20
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Granted: 1975-09-30
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Expires: 1993-09-20
Abstract
Abstract This invention relates to a method of producing new decomposable resin moldings. More particularly, the invention pertains to a method of producing resin moldings given aquatic and microorganic decomposabilities by mixing thermoplastic resin with a microorganism and molding the mixture with heating. We, inventors found that resin moldings with favourable aquatic and microorganic decomposabilities can be obtained without impairing the property of the resin itself when the thermoplastic resin and microorganism are mixed and the mixture is molded with heating. Moreover, the mechanical strength of the resin moldings are increased by the method of the present invention.
Inventors
- 👤 Kenjiro Tanaka
- 👤 Tadao Shigeta
- 👤 Nobuyuki Kikkawa
- 👤 Noriharu Kumura
- 👤 Katsuhiro Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:27
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L89/00; C08L2207/00; C08L2207/06; C08L2207/062; C08L2666/00; C08L2666/02; C08L2666/26; Y; Y10; Y10S; Y10S260/00; Y10S260/43
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
A METHOD OF PREPARING DECOMPOSABLE RESIN MOLDINGS WHICH COMPRISES THE STEP OF MOLDING A MIXTURE OF POLYOLEFIN AND YEAST WITH HEATING AT A TEMPERATURE SUFFICIENT TO MOLD SAID MIXTURE.
Claim 2
Independent Claim
29 words
A METHOD OF PREPARING DECOMPOSABLE RESIN MOLDINGS WHICH COMPRISES THE STEP OF MOLDING A MIXTURE OF POLYOLEFIN AND YEAST WITH HEATING AT A TEMPERATURE SUFFICIENT TO MOLD SAID MIXTURE.
Claim 3
Dependent Claim
49 words
A method according to claim 1, wherein the molding step is carried out by charging the mixture to a mold, heating said mixture in the mold at a temperature of from 120* to 200*C under a pressure of from 20 to 400 kg/cm2 and recovering the resultant resin moldings.
Claim 4
Dependent Claim
12 words
A method according to claim 1, wherein the polyolefin is a polyethylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |