Patent US3827933A successfully refreshed from Google Patents.
US3827933A
Expired / Lapsed
US
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Filled polymethyl methacrylate article and a process for its manufacture
Assignee: EIDP Inc
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Filing: 1972-04-03
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Granted: 1974-08-06
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Expires: 1992-04-03
Abstract
Abstract DISCLOSED HEREIN IS A FILLED POLYMETHYL METHACRYLATE ARTICLE WHICH, BY VIRTUE OF THE FACT THAT IT CONTAINS 50 TO 80 PERCENT BY WEIGHT PF PARTICULATE HYDRATE OF ALUMINA AND 4 TO 20 PERCENT BY WEIGHT OF GLASS FILAMENTS PERFERABLY DISPOSED WITHIN THE ARTICLE IN DISCRETE BUNDLES ALIGNED PARALLEL TO THE PLANE OF THE ARTICLE, IS WEATHER RESIATANT FIRE RESISTANT AND TOUGH.
Inventors
- 👤 R Duggins
- 👤 H Miller
- 👤 E Vassiliou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:21
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/04; C04B26/06; C08; C08F; C08F2/00; C08F2/44; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/14; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249946; Y10T428/26; Y10T428/268; Y10T428/269; Y10T428/29; Y10T428/2904
Claims Analysis
Total Claims: 0
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |