US3738895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making laminated structural panels of cellular foamed resin
Assignee: Compagnie de Saint Gobain SA
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Filing: 1971-12-16
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Granted: 1973-06-12
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Expires: 1991-12-16
Abstract
Abstract THE PRODUCTION OF ALMINATED STRUCTURAL PANELS, PARTICULARLY FOR BUILDINGS, COMPOSED OF A CELLULAR CORE OF FORMED RESIN WITH FACING LAYERS OF A HARDENABLE RESIN, WITH OR WITHOUT REINFORCEMENT, WHICH ARE ASSEMBLED IN SUCH WAYS THAT THE FOAMING OF THE CORE RESIN OCCURS SIMULTANEOUSLY WITH THE HARDENING OF THE RESIN OF THE FACING LAYERS SO THAT THE ASSEMBLY IS INTEGRATED EFFECTIVELY, GIVING RISE TO NO FAULTY JOINTS OR DELETERIOUS STRESSES, AND THEREBY IMPARTING MAXIMUM STRENGTH CHARACTERISTICS TO THE PANELS.
Inventors
- 👤 J Paymal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:07
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/30; B29C44/308; B29C44/26; B29C44/32; B29C44/321; B29C44/3215; B29C44/326; B29C44/329; B29C70/00; B29C70/003; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/504; B29C70/508; B32; B32B; B32B17/00; B32B17/06; B32B27/00; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/205; E04C2/30; E04C2/38; B29C43/00; B29C43/32; B29C43/44; B29C43/48; B29C2043/483; B29K; B29K2063/00; B29K2067/00; B29K2067/06; B29K2075/00; B29K2105/00; B29K2105/04; B29K2105/06; B29K2105/08; B29K2105/0809; B29K2105/0845; B29K2105/0854; B29K2309/00; B29K2309/08; B29L; B29L2007/00; B29L2009/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |