US3912823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum skin-package for cooking food
Assignee: EIDP Inc
•
Filing: 1973-02-23
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Granted: 1975-10-14
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Expires: 1993-02-23
Abstract
Abstract A vacuum skin-package is provided formed from a substantially amorphous polyethylene terephthalate package member of less than 15% crystallinity and a polyethylene terephthalate-azelate package member with a product contained therebetween.
Inventors
- 👤 William Paul Kane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:14
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/28; B65D75/30; B65D75/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A VACUUM SKIN-PACKAGE SUITABLE FOR COOKING AT TEMPERATURES OF UP TO ABOUT 400*F. WHICH COMPRISES: A LOWER PACKAGE MEMBER OF PROLYETHYLENE TEREPHTHALAT-AZALATE FILM, SUCH FILM BEING STRETCH-ORIENTED AND HEAT-SET AND IN SUBSTANTIALLY FLAT FORM IN THE PACKAGE: A THERMOFORABLE UPPER PACKAGE MEMBER OF POLYETHYLENE TEREPHTHALATE FILM HAVING A DEGREE OF CRYSTALLINITY OF LESS THAN 5%, A FOOD PRODUCT POSITIONED BETWEEN THE UPPER AND LOWER PACKAGE MEMBERS IN A SUBSTANTIALLY AIR-FREE STATE WITH THE UPPER PACKAGE MEMBER BEING IN SKIN-TIGHT ENGAGEMENT WITH THE FOOD PRODUCTS, AND SAID UPPER PACKAGE MEMBER HEAT SEALED DIRECTLY TO THE LOWER PACKAGE MEMBER WITHOUT THE USE OF ADHESIVES, THEREBY FORMING A HEATSEALED, VACUUM SKIN-PACKAGE,
Claim 2
Dependent Claim
108 words
A VACUUM SKIN-PACKAGE SUITABLE FOR COOKING AT TEMPERATURES OF UP TO ABOUT 400*F. WHICH COMPRISES: A LOWER PACKAGE MEMBER OF PROLYETHYLENE TEREPHTHALAT-AZALATE FILM, SUCH FILM BEING STRETCH-ORIENTED AND HEAT-SET AND IN SUBSTANTIALLY FLAT FORM IN THE PACKAGE: A THERMOFORABLE UPPER PACKAGE MEMBER OF POLYETHYLENE TEREPHTHALATE FILM HAVING A DEGREE OF CRYSTALLINITY OF LESS THAN 5%, A FOOD PRODUCT POSITIONED BETWEEN THE UPPER AND LOWER PACKAGE MEMBERS IN A SUBSTANTIALLY AIR-FREE STATE WITH THE UPPER PACKAGE MEMBER BEING IN SKIN-TIGHT ENGAGEMENT WITH THE FOOD PRODUCTS, AND SAID UPPER PACKAGE MEMBER HEAT SEALED DIRECTLY TO THE LOWER PACKAGE MEMBER WITHOUT THE USE OF ADHESIVES, THEREBY FORMING A HEATSEALED, VACUUM SKIN-PACKAGE,
References Cited (Backward Citations)
US2784456A
Cited
US3429854A
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US3554976A
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US3547891A
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US3507383A
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US3695900A
Cited
US3755042A
Cited
US3750873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |