Patent US6113594A successfully refreshed from Google Patents.
US3328142A
Expired / Lapsed
US
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Formation of glass mats
Assignee: Compagnie de Saint Gobain SA
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Filing: 1960-07-26
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Granted: 1967-06-27
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Expires: 1980-07-26
Abstract
No abstract record available.
Inventors
- 👤 Levecque Marcel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:55
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4218; C; C03; C03C; C03C13/00; C03C13/04; C03C13/045; C03C13/046; C04; C04B; C04B30/00; C04B30/02; D04H1/4226; D04H1/4382; D04H1/43835; D04H1/43838; D04H1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
APPARATUS FOR FORMING PLATES OF FIBERS GLASS THAT COMPRISES DOUBLE CONVEYOR MEANS TO FORM A LOOSE MATTRESS OF FIBERS, MEANS TO CONFINE AND SLIGHTLY COMPRESS THE MATTRESS, MEANS TO BLOW HOT GAS THROUGH THE MATTRESS, AND THEREBY TO RAISE ITS TEMPERATURE TO A DEGREE CIRCA 300500*C. AT LEAST APPROACHING THE POINT AT WHICH ITS FIBERS JOIN AT THEIR POINTS OF CONTACT, MEANS TO RELEASE THE HOT MATTRESS FROM COMPRESSION, RADIANT MEANS TO DIRECT HEAT UPON ITS HOT SURFACE AND RAISE IT TO A DEGREE CIRCA 700* C. SUFFICIENT TO JOIN ITS FIBERS AT THEIR POINTS OF CONTACT AND TO COLLAPSE THE MATTRESS, MEANS TO COMPRESS THE COLLAPSED MATTRESS AND MEANS TO COOL THE COMPRESSED PRODUCT.
Claim 2
Dependent Claim
86 words
A PROCESS OF MAKING POROUS PLATES OF GLASS FIBERS WHICH COMPRISES FORMING A MATTRESS OF GLASS FIBERS OF THE SAME COMPOSITION AND DIFFERENT THERMOPLASTIC PROPERTIES, FIRST HEATING THE MATTRESS BY HOT GAS TO A TEMPERATURE ADJACENT TO BUT BELOW THE TEMPERATURE AT WHICH STABILIZATION BEGINS, TERMINATING THE HEATING BY GAS, IMMEDIATELY HEATING THE HOT MATTRESS BY RADIATION TO ITS COLLAPSE AND WELDING POINT WHEREYBY TO FORM THE PLATE AND WELD THE FIBERS AT POINTS OF CONTACTS, AND COOLING THE COLLAPSED PLATE BEFORE THE FIBERS ARE STABILIZED.
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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |