US3792122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphenylene ether resins containing a butadiene-acrylic-styrene polymer modifier
Assignee: Rohm and Haas Co
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Filing: 1971-04-21
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Granted: 1974-02-12
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Expires: 1991-04-21
Abstract
Abstract POLYPHENYLENE ETHER RESINS ARE MODIFIED BY A MULTIPLESTAGE SEQUENTIALLY-PRODUCED POLYMER COMPRISING A FIRST STAGE POLYMERIZED FROM A MONOMER MIXTURE COMPRISING AT LEAST 40 WEIGHT PERCENT BUTADIENE AND A FINAL STAGE POLYMERIZED IN THE PRESENCE OF A PRODUCT CONTAINING THE FIRST STAGE FROM A MONOMER MIXTURE COMPRISING A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKYL METHACRYLATES, ALICYCLIC METHACRYLATES, ALKYL ACRYLATES AND MIXTURES OF THE FOREGOING.
Inventors
- 👤 H Fromuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:47
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; Y; Y10; Y10S; Y10S525/00; Y10S525/905
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |