US4847145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film for keeping freshness of vegetables and fruit
Assignee: Individual
•
Filing: 1987-07-17
•
Granted: 1989-07-11
•
Expires: 2007-07-17
Abstract
Abstract Disclosed is a film for keeping freshness of vegetables and fruit which has an ethylene-adsorptive activity. The film preferably contains a fine-porous material. According to the film, the ethylene gas evolved from vegetables and fruit can be very effectively removed and thus freshness of vegetables and fruit can be maintained.
Inventors
- 👤 Mitsuo Matsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:40
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/266; B65D81/267; C; C08; C08J; C08J5/00; C08J5/18; C08K; C08K7/00; C08K7/22; C08K7/24; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/26; Y10T428/268; Y10T428/31504; Y10T428/31725; Y10T428/31765; Y10T428/31786; Y10T428/31855; Y10T428/31931; Y10T428/31935; Y10T428/31938
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
A polymer film capable of adsorbing ethylene at a rate of at least 0.005 ppm per hour per square meter for maintaining the freshness of vegetables and fruit, said polymer film comprising a polymer mixed with a fine-porous material which has been treated with oxygen in the presence of electromagnetic irradiation or ozone, said polymer being selected from the group consisting of polyethylene, polypropylene, polybutadiene, polyvinyl acetate, polyesters and polyamides, said fine-porous material being selected from the group consisting of pumice-tuff, zeolite, active carbon, cristobalite and clinoptilolite, and mixed and sintered with a metal oxide selected from the group consisting of SiO 2 , TiO 2 , Al 2 O 3 , Fe 2 O 3 , CaO, Na 2 O and mixtures thereof.
Claim 2
Dependent Claim
124 words
A polymer film capable of adsorbing ethylene at a rate of at least 0.005 ppm per hour per square meter for maintaining the freshness of vegetables and fruit, said polymer film comprising a polymer mixed with a fine-porous material which has been treated with oxygen in the presence of electromagnetic irradiation or ozone, said polymer being selected from the group consisting of polyethylene, polypropylene, polybutadiene, polyvinyl acetate, polyesters and polyamides, said fine-porous material being selected from the group consisting of pumice-tuff, zeolite, active carbon, cristobalite and clinoptilolite, and mixed and sintered with a metal oxide selected from the group consisting of SiO 2 , TiO 2 , Al 2 O 3 , Fe 2 O 3 , CaO, Na 2 O and mixtures thereof.
Claim 3
Dependent Claim
20 words
Polymer film according to claim 1, wherein said polymer film contains at least 1% by weight of said fine-porous material.
Claim 4
Dependent Claim
15 words
Polymer film according to claim 1, wherein said fine-porous material is at least 200 mesh.
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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |