US3764428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of foaming fibrous fleece
Assignee: Sumitomo Bakelite Co Ltd
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Filing: 1970-07-15
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Granted: 1973-10-09
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Expires: 1990-07-15
Abstract
Abstract A PROCESS AND STRUCTURAL FOAMED PRODUCT PRODUCED THEREFROM IN WHICH A POWDERY COMPOSITION COMPRISING A THERMOSETTING RESIN AND A FOAMING AGENT, WHICH UPON HEATING GENERATES A GAS, IS SPRINKLED ALL OVER A LAYER OF FIBROUS FLEECE, THE FIBERS OF WHICH ARE UNBONDED TO ONE ANOTHER. THE TREATED LAYERS ARE PREFORMED (COMPRESSED) AT A TEMPERATURE BELOW THE FOAMING TEMPERATURE AND THE CURING TEMPERATURE OF THE RESIN. THE PREFORMED PRODUCT IS THEN HEATED TO FOAM AND CURE THE RESIN, AND SIMULTANEOUSLY TO EXPAND THE FLEECE TOGETHER WITH THE RESIN EMPLOYED.
Inventors
- 👤 K Oshima
- 👤 Y Ito
- 👤 S Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:19
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B32; B32B; B32B15/00; B32B15/04; B32B15/046; B32B15/20; B32B5/00; B32B5/18; B32B5/20; B32B5/22; B32B5/24; B32B5/26; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/60; B32B2607/00; Y; Y10; Y10S; Y10S264/00; Y10S264/02; Y10S264/05; Y10S264/17; Y10T; Y10T428/00; Y10T428/23907; Y10T428/2395; Y10T428/23986; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999; Y10T428/29; Y10T428/2904; Y10T428/2907
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |