US2955940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preservative treatment of vegetable produce
Assignee: Hodges Research and Development Co
•
Filing: 1957-10-11
•
Granted: 1960-10-11
•
Expires: 1977-10-11
Abstract
No abstract record available.
Inventors
- 👤 Beverly E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
CPC Classifications
A; A23; A23B; A23B7/00; A23B7/14; A23B7/144; A23B7/152; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3936; Y10T24/3953
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE METHOD OF TREATING FRESH LEAFY VEGETABLE PRODUCE TO IMPROVE ITS KEEPING QUALITIES DURING SHIPMENT AND DISTRIBUTION, THAT INCLUDES PLACING THE PRODUCE IN A CHAMBER WITH GAS PERMEABLE ENCLOSURES ABOUT AND CONTACTING THE PIECES OF PRODUCE, EVACUATING THE CHAMBER TO COOL THE PRODUCE AND REMOVE AIR FROM WITHIN THE ENCLOSURES, AND RELIEVING THE VACUUM BY INTRODUCING TO AND CHAMBER A SUBSTANTIALLY OXYGEN-FREE INNOCOUS GAS CONSISTING OF ON THE ORDER OF 85% NITROGEN, 12% CARBON DIOXIDE, AND 2% CARBON MONIXIDE, SAID GAS BEING PRODUCED BY THE COMBUSTION OF PROPANE AND BUTANE WHICH IS CAUSED BY VIRTUE OF THE EVACUATION TO PERMEATE THE PRODUCE AND BY VIRTUE OF THE ENCLOSURES TO RESIST OXYGEN ACESS TO THE PRODUCE DURING SUBSEQUENT SHIPMENT AND DISTRIBUTION.
Claim 2
Independent Claim
120 words
THE METHOD OF TREATING FRESH LEAFY VEGETABLE PRODUCE TO IMPROVE ITS KEEPING QUALITIES DURING SHIPMENT AND DISTRIBUTION, THAT INCLUDES PLACING THE PRODUCE IN A CHAMBER WITH GAS PERMEABLE ENCLOSURES ABOUT AND CONTACTING THE PIECES OF PRODUCE, EVACUATING THE CHAMBER TO COOL THE PRODUCE AND REMOVE AIR FROM WITHIN THE ENCLOSURES, AND RELIEVING THE VACUUM BY INTRODUCING TO AND CHAMBER A SUBSTANTIALLY OXYGEN-FREE INNOCOUS GAS CONSISTING OF ON THE ORDER OF 85% NITROGEN, 12% CARBON DIOXIDE, AND 2% CARBON MONIXIDE, SAID GAS BEING PRODUCED BY THE COMBUSTION OF PROPANE AND BUTANE WHICH IS CAUSED BY VIRTUE OF THE EVACUATION TO PERMEATE THE PRODUCE AND BY VIRTUE OF THE ENCLOSURES TO RESIST OXYGEN ACESS TO THE PRODUCE DURING SUBSEQUENT SHIPMENT AND DISTRIBUTION.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |