US3243484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for increasing the strength of sandwich materials having foamed polymeric cores
Assignee: Beazer East Inc
•
Filing: 1963-06-24
•
Granted: 1966-03-29
•
Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Richard H Immel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:53
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/206; B29C44/34; B29C44/56; Y; Y10; Y10S; Y10S264/00; Y10S264/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A METHOD OF INCREASING THE COLUMNAR COMPRESSIVE STRENGTH OF FLAT, PREFORMED SANDWICH TYPE STRUCTURAL MATERIALS HAVING SURFACES OF PAPER ADHERED TO A CORE OF EXPANDED STYRENE POLYMER FOAM COMPRISING INTRODUCING SAID MATERIALS INTO A HEATING ZONE MAINTAINED AT A TEMPERATURE OF FROM 330-600*F. SUCH THAT HEAT IS APPLIED TO THE OUTER PORTION OF SAID SURFACES OF PAPER, MAINTAINING SAID MATERIALS IN SAID ZONE UNTIL THE POLYMER FOAM IMMEDIATELY ADJACENT TO THE PAPER SURFACES BECOMES HEATED AND PARTIALLY MELTS AND THEREAFTER REMOVING SAID MATERIAL, WHOSE DIMENSIONS ARE SUBSTANTIALLY UNCHANGED BY SAID HEATING, FROM SAID HEATING ZONE WHEREBY THE POLYMER IMMEDIATELY ADJACENT TO SAID PAPER SURFACES COOLS AND HARDENS TO FORM SUBSTANTIALLY CONTINUOUS LAYERS OF HARD PLASTIC IMMEDIATELY ADJACENT TO SAID PAPER SURFACES.
Claim 2
Independent Claim
121 words
A METHOD OF INCREASING THE COLUMNAR COMPRESSIVE STRENGTH OF FLAT, PREFORMED SANDWICH TYPE STRUCTURAL MATERIALS HAVING SURFACES OF PAPER ADHERED TO A CORE OF EXPANDED STYRENE POLYMER FOAM COMPRISING INTRODUCING SAID MATERIALS INTO A HEATING ZONE MAINTAINED AT A TEMPERATURE OF FROM 330-600*F. SUCH THAT HEAT IS APPLIED TO THE OUTER PORTION OF SAID SURFACES OF PAPER, MAINTAINING SAID MATERIALS IN SAID ZONE UNTIL THE POLYMER FOAM IMMEDIATELY ADJACENT TO THE PAPER SURFACES BECOMES HEATED AND PARTIALLY MELTS AND THEREAFTER REMOVING SAID MATERIAL, WHOSE DIMENSIONS ARE SUBSTANTIALLY UNCHANGED BY SAID HEATING, FROM SAID HEATING ZONE WHEREBY THE POLYMER IMMEDIATELY ADJACENT TO SAID PAPER SURFACES COOLS AND HARDENS TO FORM SUBSTANTIALLY CONTINUOUS LAYERS OF HARD PLASTIC IMMEDIATELY ADJACENT TO SAID PAPER SURFACES.
References Cited (Backward Citations)
CA599493A
Cited
US3123656A
Cited
US2722719A
Cited
US2767436A
Cited
DE944285C
Cited
US2878153A
Cited
US2867222A
Cited
US3062698A
Cited
US2898632A
Cited
US2917217A
Cited
US2957793A
Cited
US2998501A
Cited
US3039911A
Cited
US3099516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |