Patent US3632791A successfully refreshed from Google Patents.
US3632791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer of alkenyl aromatic monomer and maleimido reinforced with glass fibers
Assignee: Dow Chemical Co
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Filing: 1968-11-06
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Granted: 1972-01-04
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Expires: 1988-11-06
Abstract
Abstract THE INVENTION RELATES TO REINFORCED OR LAMINATED PLASTIC ARTICLES COMPRISING REINFORCING GLASS FIBERS BONDED TO A COPOLYMER OF AN ALKENYL AROMATIC MONOMER HAVING A SINGLE AROMATIC RING AND A CYCLIC IMIDE OF AN UNSATURATED DICARBOXYLIC ACID. THE COPOLYMER HAS THE UNIQUE PROPERTY OF SELF-PROMOTING ADHESION BETWEEN THE GLASS FIBERS AND
Inventors
- 👤 Walter E F Rupprecht
- 👤 Kenneth J Guilette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:35
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/0405; C08J5/043; C08J2325/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T442/00; Y10T442/20; Y10T442/2738
Claims Analysis
Total Claims: 0
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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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |