Patent US3271503A successfully refreshed from Google Patents.
US3271503A
Expired / Lapsed
US
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Method and apparatus for forming plastic articles
Assignee: Monsanto Co
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Filing: 1961-05-08
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Granted: 1966-09-06
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Richard K Shelby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:10
CPC Classifications
B; B29; B29C; B29C57/00; B29C57/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
A METHOD OF FORMING PLASTIC CUP WITH A ROLLED RIM COMPRISING THE STEPS OF PROVIDING A MOLDED PLASTIC CUP WITH A DOWNTURNED SKIRT AT ITS UPPER EDGE, SAID SKIRT DEFINING AN OUTER SURFACE AREA, THEREAFTER APPLYING LOCALIZED HEAT TO THE OUTER SURFACE AREA, OF THE DOWNTURNED SKIRT TO BRING THE TEMPERATURE OF THE SKIRT TO A SUBSTANTIALLY UNIFORM FORMABLE LEVEL, IMMEDIATELY THEREAFTER ROLLING THE BOTTOM EDGE OF THE SKIRT INWARDLY ON A RADIUS TOWARD THE CUP WILL, AND THEREAFTER DISCONTINUING THE APPLICATION OF HEAT TO THE SKIRT.
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US1567007A
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US1876931A
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |