Patent US3444282A successfully refreshed from Google Patents.
US3444282A
Expired / Lapsed
US
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Method for forming crimped rim on a foam plastic object
Assignee: Dow Chemical Co
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Filing: 1966-03-28
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Granted: 1969-05-13
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Expires: 1986-03-28
Abstract
No abstract record available.
Inventors
- 👤 Francis L Burkett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:26
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/10; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/256; B29L; B29L2031/00; B29L2031/712; B29L2031/7132
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
A METHOD FOR FORMING A CRIMPED RIM ON AN OBJECT FORMED FROM A SHEET OF FOAM PLASTIC COMPRISING THE STEPS OF HEATING THE SHEET OF FOAM PLASTIC, FORMING THE MAJOR PORTION OF THE DESIRED OBJECT; FOLDING DOWNWARDLY THE PORTION OF SAID SHEET EXTENDING ABOUT THE PERIPHERY OF THE MAJOR PORTION OF THE OBJECT; SHEARING SAID SHEET ABOUT THE PERIPHERY OF SAID MAJOR PORTION; AND ENGAGING AND FORCIBLY URGING UPWARDLY THE LOWER EXPOSED EDGE OF THE FOLDED PORTION WHILE CONFINING THE FOLDED PORTION TO CRIMP THE FOLDED PORTION AGAINST THE SIDE OF SAID MAJOR PORTION OF THE OBJECT.
Claim 2
Independent Claim
97 words
A METHOD FOR FORMING A CRIMPED RIM ON AN OBJECT FORMED FROM A SHEET OF FOAM PLASTIC COMPRISING THE STEPS OF HEATING THE SHEET OF FOAM PLASTIC, FORMING THE MAJOR PORTION OF THE DESIRED OBJECT; FOLDING DOWNWARDLY THE PORTION OF SAID SHEET EXTENDING ABOUT THE PERIPHERY OF THE MAJOR PORTION OF THE OBJECT; SHEARING SAID SHEET ABOUT THE PERIPHERY OF SAID MAJOR PORTION; AND ENGAGING AND FORCIBLY URGING UPWARDLY THE LOWER EXPOSED EDGE OF THE FOLDED PORTION WHILE CONFINING THE FOLDED PORTION TO CRIMP THE FOLDED PORTION AGAINST THE SIDE OF SAID MAJOR PORTION OF THE OBJECT.
Claim 3
Dependent Claim
48 words
THE METHOD OF CLAIM 1 FURTHER INCLUDING THE STEPS OF SELECTIVELY SUPER-EXPANDING PREDETERMINED AREAS OF SAID MAJOR PORTION OF THE OBJECT ABOUT ITS PERIPHERY ADJACENT ITS BASE BY APPLYING A VACUUM TO CAVITIES DEFINING SAID AREAS, TO THEREBY PROVIDE INDENTS IN SAID MAJOR PORTIONS ABOUT ITS INTERIOR PERIPHERY.
References Cited (Backward Citations)
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Cited
US3173174A
Cited
US3137747A
Cited
US3138826A
Cited
FR1337903A
Cited
US3338997A
Cited
US3357053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |