US3616162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Autogenously interconnected and compressed polystyrene pearls
Assignee: SAINT Cie
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Filing: 1969-01-21
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Granted: 1971-10-26
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Expires: 1989-01-21
Abstract
Abstract Objects of expanded polystyrene pearls are made in sandwiches of which the layers differ in their constitution, the size of the pearls, their densities and the like. Such objects are stronger, more flexible, and provide better sound and heat insulation than objects of like thickness made from a single type of material. Sandwiches of cellular polystyrene and cellular polysulfone, and sandwiches of different kinds of cellular polystyrene, or different polysulfones exemplify the invention. Novel machinery is provided for making the new materials.
Inventors
- 👤 Jean H Noziere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:44
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/02; B32B5/00; B32B5/22; B32B5/32; B29; B29C; B29C44/00; B29C44/20; B29C44/206; B29C44/22; B29C44/24; B29C44/30; B29C44/34; B29C44/56; B29C44/5627; B29C44/5636; B32B1/00; B32B5/18; B32B2250/00; B32B2250/22; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2305/00; B32B2305/02; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24942; Y10T428/24992; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249972; Y10T428/249981; Y10T428/25; Y10T428/29
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
14 words
Polystyrene plyboard according to claim 1 in which said other ply comprises polystyrene pearls.
Claim 2
Dependent Claim
14 words
Polystyrene plyboard according to claim 1 in which said other ply comprises polysulfone pearls.
Claim 3
Dependent Claim
22 words
Polystyrene plyboard according to claim 1 in which said one ply comprises fine pearls and said other ply comprises relatively coarse pearls.
Claim 4
Dependent Claim
33 words
Polystyrene plyboard according to claim 1 in which the pearls of at least one ply include a first retardant in their composition from the class consisting of halogenated hydrocarbons and halogenated organic phosphenates.
Claim 5
Dependent Claim
29 words
Polystyrene plyboard according to claim 1 comprising three autogenously interconnected plies of which the outer plies are of fine polystyrene pearls and the inner ply is of larger pearls.
Claim 6
Dependent Claim
28 words
Laminated, cellular plyboard comprising a ply of expanded polystyrene pearls autogenously welded to a different but compatible cellular ply and being of substantially uniform thickness and zigzag construction.
Claim 7
Dependent Claim
19 words
The product of claim 7 having dense cellular outer plies and bonded thereto an inner ply of less density.
Claim 8
Dependent Claim
46 words
Plyboard of zigzag construction having a plurality of plies autogenously welded one to the other, each ply being composed of expanded and compressed pearls of thermoplastic resin of which at least one ply is polystyrene, the pearls in each ply being autogenously welded to contiguous pearls.
Claim 9
Dependent Claim
17 words
Plyboard according to claim 9 comprising an inner cellular ply between contiguous cellular plies of greater density.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |