US3268635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for forming foam plastic article
Assignee: Individual
•
Filing: 1963-02-25
•
Granted: 1966-08-23
•
Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 Robert A Kraus
- 👤 Edmund J Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:11
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/10; B29C44/105; Y; Y10; Y10S; Y10S264/00; Y10S264/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
THE METHOD OF FORMING A THIN WALLED UNITARY FORM PLASTIC ARTICLE COMPRISING THE STEPS OF LIQUIFYING A FOAMABLE PLASTIC MATERIAL BY HEATING SAID PLASTIC, INTRODUCING SAID HEATED PLASTIC INTO A CONFINED VOLUME GREATER THAN THE VOLUME OF SAID HEATED PLASTIC AND CAPABLE OF BEING FILLED BY SAID PLASTIC UPON FOAMING THEREOF, SAID CONFINED VOLUME DEFINING THE CONTOUR OF AN ARTICLE TO BE PRODUCED, PROVIDING A PRESSURIZED FLUID IN SAID CONFINED VOLUME SO AS TO CONTACT ALL PARTS OF THE SURFACE OF SAID HEATED PLASTIC EXPOSED THEREIN, SAID FLUID BEING AT A PRESSURE SUCH THAT IT MAINTAINS SAID HEATED PLASTIC UNDER FLUID PRESSURE SUFFICIENT TO PRECLUDE THE FOAMING THEREOF WHILE SAID PLASTIC IS SO INTRODUCED INTO SAID CONFINED VOLUME, THEN RELEASING SAID FLUID PRESSURE AFTER SAID PLASTIC HAS BEEN INTRODUCED INTO SAID CONFINED VOLUME AND ALLOWING SAID HEATED PLASTIC TO FORM WITHIN SAID CONFINED VOLUME TO FILL THE SAME, AND THEN COOLING SAID PLASTIC TO SOLIDIFY THE SAME AND RESULT IN A FOAM PLASTIC ARTICLE HAVING THE CONTOUR OF SAID CONFINED VOLUME.
Claim 2
Independent Claim
171 words
THE METHOD OF FORMING A THIN WALLED UNITARY FORM PLASTIC ARTICLE COMPRISING THE STEPS OF LIQUIFYING A FOAMABLE PLASTIC MATERIAL BY HEATING SAID PLASTIC, INTRODUCING SAID HEATED PLASTIC INTO A CONFINED VOLUME GREATER THAN THE VOLUME OF SAID HEATED PLASTIC AND CAPABLE OF BEING FILLED BY SAID PLASTIC UPON FOAMING THEREOF, SAID CONFINED VOLUME DEFINING THE CONTOUR OF AN ARTICLE TO BE PRODUCED, PROVIDING A PRESSURIZED FLUID IN SAID CONFINED VOLUME SO AS TO CONTACT ALL PARTS OF THE SURFACE OF SAID HEATED PLASTIC EXPOSED THEREIN, SAID FLUID BEING AT A PRESSURE SUCH THAT IT MAINTAINS SAID HEATED PLASTIC UNDER FLUID PRESSURE SUFFICIENT TO PRECLUDE THE FOAMING THEREOF WHILE SAID PLASTIC IS SO INTRODUCED INTO SAID CONFINED VOLUME, THEN RELEASING SAID FLUID PRESSURE AFTER SAID PLASTIC HAS BEEN INTRODUCED INTO SAID CONFINED VOLUME AND ALLOWING SAID HEATED PLASTIC TO FORM WITHIN SAID CONFINED VOLUME TO FILL THE SAME, AND THEN COOLING SAID PLASTIC TO SOLIDIFY THE SAME AND RESULT IN A FOAM PLASTIC ARTICLE HAVING THE CONTOUR OF SAID CONFINED VOLUME.
References Cited (Backward Citations)
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US2831214A
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US3058161A
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Cited
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Cited
US3218375A
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US3211605A
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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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |