US3116349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding foamed plastic sandwich panel
Assignee: Beazer East Inc
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Filing: 1961-12-19
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Granted: 1963-12-31
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Expires: 1981-12-19
Abstract
No abstract record available.
Inventors
- 👤 Richard H Immel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
B; B32; B32B; B32B27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS FOR PRODUCING A LAMINATE OF DENSE MATERIAL AND FOAMED STYRENE POLYMER WHICH COMPRISES PREEXPANDING EXPANDABLE STYRENE POLYMER PARTICLES, AGING SAID PARTICLES, CRUSHING SAID AGED PARTICLES TO HALF THEIR VOLUME FORMING A LAYER OF SAID PARTICLES ON SAID DENSE MATERIAL AS A FACE MEMBER, SUBJECTING SAID PARTICLES TO HEAT WHILE MAINTAINING PRESSURIZED CONTACT THEREOF WITH SAID FACE MEMBER WHEREBY SAID PARTICLES FUSE TOGETHER AND BOND TO SAID FACE MEMBER TO FORM A LAMINATE OF SAID DENSE MATERIAL AS A FACE MEMBER WITH A LAYER OF FOAMED POLYSTYRENE ADHERING THERETO, PLACING A PAIR OF SAID LAMINATES IN SPACED POSITION WITH THE LAYERS OF FORMED POLYSYTRENE FACING EACH OTHER, FILLING THE SPACE BETWEEN SAID MEMBERS WITH PRE-EXPANDED EXPANDABLE POLYSTYRENE PARTICLES, AND HEATING SAID POLYSTYRENE PARTICLES WHEREBY THE EXPANDABLE POLYSTYRENE PARTICLES EXPAND, FOAM, AND FUSE
Claim 2
Dependent Claim
133 words
A PROCESS FOR PRODUCING A LAMINATE OF DENSE MATERIAL AND FOAMED STYRENE POLYMER WHICH COMPRISES PREEXPANDING EXPANDABLE STYRENE POLYMER PARTICLES, AGING SAID PARTICLES, CRUSHING SAID AGED PARTICLES TO HALF THEIR VOLUME FORMING A LAYER OF SAID PARTICLES ON SAID DENSE MATERIAL AS A FACE MEMBER, SUBJECTING SAID PARTICLES TO HEAT WHILE MAINTAINING PRESSURIZED CONTACT THEREOF WITH SAID FACE MEMBER WHEREBY SAID PARTICLES FUSE TOGETHER AND BOND TO SAID FACE MEMBER TO FORM A LAMINATE OF SAID DENSE MATERIAL AS A FACE MEMBER WITH A LAYER OF FOAMED POLYSTYRENE ADHERING THERETO, PLACING A PAIR OF SAID LAMINATES IN SPACED POSITION WITH THE LAYERS OF FORMED POLYSYTRENE FACING EACH OTHER, FILLING THE SPACE BETWEEN SAID MEMBERS WITH PRE-EXPANDED EXPANDABLE POLYSTYRENE PARTICLES, AND HEATING SAID POLYSTYRENE PARTICLES WHEREBY THE EXPANDABLE POLYSTYRENE PARTICLES EXPAND, FOAM, AND FUSE
References Cited (Backward Citations)
US2986537A
Cited
US3037897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |