US3655826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic elastomer impact modifier
Assignee: Rohm and Haas Co
•
Filing: 1969-05-08
•
Granted: 1972-04-11
•
Expires: 1989-05-08
Abstract
Abstract THREE-STAGE ACRYLIC ELASTOMER IMPACT MODIFIERS ARE PROVIDED. THE POLYMERS COMPRISE A FIRST STAGE OF CROSSLINKED POLYACRYLATE RUBBER FOLLOWED BY A RIGID STYRENE-TYPE STAGE, FOLLOWED IN TURN BY A STAGE OF RIGID POLYMER CHOSEN FOR COMPATIBILITY IN THE POLYMER TO BE MODIFIED. THE MODIFIER IS PARTICULARLY USEFUL AS AN IMPACT STRENGTH IMPROVE, PROCESSING AID AND/OR HEAT DISTORTION TEMPERATURE IMPROVER IN VINYL CHLORIDE POLYMERS.
Inventors
- 👤 Robert Paul Fellmann
- 👤 Robert Clarke Fettes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:35
CPC Classifications
C; C08; C08F; C08F293/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |