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US3759722A
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US
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Method for evacuating packages
Assignee: Union Carbide Corp
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Filing: 1970-03-31
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Granted: 1973-09-18
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Expires: 1990-03-31
Abstract
Abstract AN IMPROVED METHOD FOR VACUUM PACKAGING AN UNCURED RED MEAT ARTICLE IS PROVIDED, IN WHICH A SHRINKABLE PLASTIC FILM BAG CONTAINING THE MEAT ARTICLE AND HAVING AN OPEN TOP IS PROGRESSIVLEY SUBJECTED TO A PERIPHERAL PRESSURE EXERTED BY A FLUID AT A TEMPERATURE NOT SO COLD AS TO STIFFEN THE FILM BUT NOT WARM ENOUGH TO DETRIMENTALLY AFFECT THE SURFACE OF THE MEAT OR TO SHRINK THE FILM. THE OPEN TOP OF THE BAG IS MAINTAINED IN COMMUNICATION WITH THE ATMOSPHERE. THE AIR IN THE BAG IS EXPELLED RAPIDLY THROUGH THE OPEN TOP UNDER THE PRESSURE OF THE FLUID ONTO THE BAG. THE BAG IS THEN CLOSED AND, IF DESIRED, HEAT SHRUNK.
Inventors
- 👤 Sius Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:51
CPC Classifications
B; B65; B65B; B65B31/00; B65D; B65D75/00; B65D75/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |