US3559562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur dioxide-releasing device
Assignee: Officemax Inc
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Filing: 1969-06-06
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Granted: 1971-02-02
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Expires: 1989-06-06
Abstract
Abstract A device for preserving fresh fruit by releasing sulfur dioxide into a sealed container of the fruit. The device comprises a layer of solid coating material and a particulate compound forming a substantially uniform dispersion throughout the layer. The compound is characterized by the release of sulfur dioxide on contact with water vapor. One device is formed of a dispersion of sodium bisulfite in a layer of white scale paraffin wax containing a viscosity-increasing agent.
Inventors
- 👤 Herbert E Carlson
- 👤 Rodrick E Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:53
CPC Classifications
A; A23; A23B; A23B7/00; A23B7/14; A23B7/144; A23B7/152
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
28 words
A device as in claim 1 wherein a mixture of said coating material includes a major portion of scale wax and a minor portion of a viscosity-increasing agent.
Claim 2
Dependent Claim
31 words
A device as in claim 2 wherein the binder is selected from the group consisting of polymono-olefins, ethylene vinyl acetate copolymers, butyl rubber, butadiene-styrene rubber, and ethylene acrylate copolymers and terpolymers.
Claim 3
Dependent Claim
28 words
A device as in claim 2 wherein the ratio of scale wax to agent is from about 2 to 1 to about eight to one parts by weight.
Claim 4
Dependent Claim
13 words
A device as in claim 1 wherein said coating material is a lacquer.
Claim 5
Dependent Claim
27 words
A device as in claim 5 wherein said lacquer is selected from the group consisting of ethyl cellulose, cellulose acetate, and cellulose acetate butyrate, and polyvinylidene halides.
Claim 6
Dependent Claim
29 words
A device as in claim 1 wherein said compound is selected from the group consisting of sodium bisulfite, sodium sulfite-fumaric acid mixture, sodium sulfite-potassium bitartrate mixture and combinations thereof.
Claim 7
Dependent Claim
28 words
A device as in claim 1 wherein the ratio of particulate compound to coating material is from about 5 to 1 to about 1 to 5 by weight.
Claim 8
Dependent Claim
20 words
A device as in claim 1 wherein the fruit is grapes and the extended time period is over 3 months.
Claim 9
Dependent Claim
20 words
A device as in claim 1 coated on a pliable base sheet which is inserted into a fruit cushioning pad.
Claim 10
Dependent Claim
15 words
A device as in claim 1 coated on the inside of a fruit cushioning pad.
Claim 11
Dependent Claim
24 words
A device as in claim 1 coated on the inside of the sealed container and forming at least a portion of the seal therefor.
Claim 12
Dependent Claim
19 words
A device as in claim 1 coated on a box liner used as a barrier to seal the container.
Claim 13
Dependent Claim
21 words
A device as in claim 1 wherein at least 30 percent of the particulate compound passes through a 325 mesh screen.
Claim 14
Independent Claim
94 words
A device for releasing sulfur dioxide under controlled conditions into a substantially sealed container of fresh grapes, said device comprising a layer of solid coating material of about 7-12 mil thickness, formed of a mixture of a major portion of scale wax and a minor portion of a binder to increase the wax viscosity, finely ground sodium sulfite particles forming a substantially uniform dispersion throughout said layer, said device serving to quickly release sulfur dioxide on initial contact with water vapor and more slowly and steadily release sulfur dioxide for at least 2 months.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |