US3804802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic composites with low alkali glass fillers
Assignee: EIDP Inc
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Filing: 1972-01-27
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Granted: 1974-04-16
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Expires: 1992-01-27
Abstract
Abstract ADHESION BETWEEN CERTAIN THERMOPLASTIC RESINS AND LOW ALKALI GLASS FILLER MATERIALS SUCH AS BOROSILICATE OR ALUMINOSILICATE GLASS IS ENHANCED BY TREATMENT OF THE FILLER MATERIAL, PRIOR TO FORMING A COMPOSITE WITHTHE RESIN, WITH A SOLUTION OF A CHROMIUM (III) COMPOUND BELONGING TO THE FOLLOWING GROUP: CHROMIUM NITRATE, OLATED CHROMIUM NITRATE, COMPLEXES OF CHROMIUM NITRATE AND OLTED CHORMIUM NITRATE WITH FUMARIC ACID OR SUBSTITUTED FUMARIC ACIDS, AND BASIC CHROMIUM CHLORIDE IN THE PRESENCE OF NITRATE IONS. COMPOSITES MADE FROM THERMOPLASTIC RESINS AND SUCH TREATED FILLER MATERIALS HAVE A VERY HIGH FLEXURAL STRENGTH AND ARE RESISTANT TO DEGRADATION BY HOT WATER.
Inventors
- 👤 H Bergna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:49
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; B; B32; B32B; B32B9/00; B32B9/04; B32B9/047; B32B27/00; B32B27/12; B32B27/28; B32B27/286; B32B27/30; B32B27/302; B32B27/32; B32B27/34; B32B27/36; B32B27/365; B32B38/00; B32B38/16; B32B38/164; B32B5/00; B32B5/02; B32B5/22; B32B5/24; B32B5/26; C08; C08K; C08K9/00; C08K9/02; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/50; B32B2307/546; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |