US3907726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biologically disintegrable resin molding comprising carboxymethyl cellulose and inorganic filler
Assignee: Individual
•
Filing: 1973-03-19
•
Granted: 1975-09-23
•
Expires: 1993-03-19
Abstract
Abstract A plastic molding made of a composition consisting of a thermoplastic resin mixed with an organic substance which is easily assimilable by microorganisms so that the molding becomes fragile and disintegrates with the passage of a fixed period of time.
Inventors
- 👤 Shinichi Tomiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:29
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; C08K5/00; C08K5/0008; C08K5/0033; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08K3/00; C08K3/10; C08L23/08; C08L23/0846; C08L23/0853; C08L3/00; Y; Y10; Y10S; Y10S260/00; Y10S260/43
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A SYNTHETIC RESIN MOLDED OBJECT THAT IS BIOLOGICALLY DISINTEGRABLE, MADE OF A UNIFORMLY BLENDED MIXTURE CONSISTING ESSENTIALLY OF, A. FROM 1 TO 10 PERCENT BY WEIGHT OF FINE PARTICLES OF AN ORGANIC SUBSTANCE THAT IS DECOMPOSABLE BY SOIL MICROORGANISMS OR ACTIVATED SLUDGE MICROORGANISMS, B. FROM 40 TO 90 PERCENT BY WEIGHT OF PARTICLES OF INORGANIC FILLER SELECTED FROM THE GROUP CONSISTING OF DIATOMACEOUS EARTH, CALCIUM CARBONATE, WHITE CARBON, TALC, CLAY, CALCIUM SULFATE HEMIHYDRATE, ANHYDROUS CALCIUM SULFATE AND CALCIUM SULFITE, AND C. THE BALANCE IS SYNTHETIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYOLEFINS AND BLENDS OF POLYOLEFINS WITH POLYVINYYL ACETATE, THE AMOUNT OF SAID SYNTHETIC RESIN BEING EFFECTIVE TO PROVIDE THE STRUCTURAL INTEGRITY OF THE MOLDED OBJECT.
Claim 2
Dependent Claim
117 words
A SYNTHETIC RESIN MOLDED OBJECT THAT IS BIOLOGICALLY DISINTEGRABLE, MADE OF A UNIFORMLY BLENDED MIXTURE CONSISTING ESSENTIALLY OF, A. FROM 1 TO 10 PERCENT BY WEIGHT OF FINE PARTICLES OF AN ORGANIC SUBSTANCE THAT IS DECOMPOSABLE BY SOIL MICROORGANISMS OR ACTIVATED SLUDGE MICROORGANISMS, B. FROM 40 TO 90 PERCENT BY WEIGHT OF PARTICLES OF INORGANIC FILLER SELECTED FROM THE GROUP CONSISTING OF DIATOMACEOUS EARTH, CALCIUM CARBONATE, WHITE CARBON, TALC, CLAY, CALCIUM SULFATE HEMIHYDRATE, ANHYDROUS CALCIUM SULFATE AND CALCIUM SULFITE, AND C. THE BALANCE IS SYNTHETIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYOLEFINS AND BLENDS OF POLYOLEFINS WITH POLYVINYYL ACETATE, THE AMOUNT OF SAID SYNTHETIC RESIN BEING EFFECTIVE TO PROVIDE THE STRUCTURAL INTEGRITY OF THE MOLDED OBJECT.
Claim 3
Dependent Claim
15 words
A molded object as claimed in claim 1, in which (A) consists of carboxyMethyl cellulose.
Claim 4
Dependent Claim
27 words
A molded object as claimed in claim 2, in which said polyolefin is selected from the group consisting of polyethylene, ethylene-vinyl acetate copolymer, polypropylene and ethylene-propylene copolymer.
Claim 5
Dependent Claim
23 words
A molded object as claimed in claim 2, in which the amount of carboxymethyl cellulose is from 3 to 8 percent by weight.
Claim 6
Dependent Claim
21 words
A molded object as claimed in claim 4, in which said resin comprises a blend of polyvinyl acetate and a polyolefin.
Claim 7
Dependent Claim
16 words
A molded object as claimed in claim 4, in which said resin comprises ethylene-vinyl acetate copolymer.
Claim 8
Dependent Claim
36 words
A molded object as claimed in claim 1, in which component (A) consists of at least one organic substance selected from the group consisting of starch, processed starch, mannitol, lactose, cellulose, lignin, carboxymethyl cellulose and casein.
References Cited (Backward Citations)
US3642761A
Cited
US3647111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |