Patent US3705353A successfully refreshed from Google Patents.
US3974722A
Expired / Lapsed
US
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Method of forming recesses in thermoplastic tray
Assignee: Mobil Oil AS
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Filing: 1975-03-10
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Granted: 1976-08-17
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Expires: 1995-03-10
Abstract
Abstract A packaging tray, especially adapted for the containment of moisture containing food products such as meat, poultry and fresh produce comprising a bottom supporting surface having a plurality of spaced apart liquid entrapping recesses. The individual recesses have a larger cross-sectional area at their base than at their top.
Inventors
- 👤 John Florian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:29
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/28; B26D3/281; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/261; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/04; Y10T83/0405; Y10T83/0419; Y10T83/0433; Y10T83/404; Y10T83/416; Y10T83/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A method for the formation of a liquid retaining recess in the bottom support surface of a foamed thermoplastic food tray which comprises, sequentially, (a) compressing said surface with a hollow punch member; (b) penetrating said compressed surface with said punch thereby forming a permanent recess in said surface and (c) removing said punch member from said recess, said recess being characterized by having a greater cross-sectional area at its base portion than at its top portion.
Claim 2
Independent Claim
77 words
A method for the formation of a liquid retaining recess in the bottom support surface of a foamed thermoplastic food tray which comprises, sequentially, (a) compressing said surface with a hollow punch member; (b) penetrating said compressed surface with said punch thereby forming a permanent recess in said surface and (c) removing said punch member from said recess, said recess being characterized by having a greater cross-sectional area at its base portion than at its top portion.
References Cited (Backward Citations)
US1439164A
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US1627742A
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US2375518A
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US3013937A
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US3155303A
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US3346400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |