Patent US3640912A successfully refreshed from Google Patents.
US3640912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding materials based on elastomeric polymers and organic binders with or without mineral fillers
Assignee: BASF SE
•
Filing: 1969-03-12
•
Granted: 1972-02-08
•
Expires: 1989-03-12
Abstract
Abstract MOLDING MATERIALS BASED ON 20 TO 90% OF ELASTOMERIC POLYMERS, 5 TO 30% OF BINDER COPOLYMERS PREPARED FROM 20 TO 80% OF BUTADIENE, 80 TO 20% OF STYRENE AND/OR ACRYLONITRILE AND 0 TO 20% OF OTHER MONOMERS AND FINELY DISPERSED IN WATER, 5 TO 200% (WITH REFERENCE TO THE BINDER COPOLYMERS) OF CEMENT AND/OR SLAKED LIME, 0.5 TO 10% OF AIR-DRYING OIL AND 0 TO 50% OF MINERAL FILLERS ARE PARTICULARLY SUITABLE FOR THE PRODUCTION OF PLAYGROUD AND SPORTSGROUND SURFACINGS WHICH ARE EASY TO LOOK AFTER.
Inventors
- 👤 Hans Reinhard
- 👤 Rolf Petri
- 👤 Wilhelm-Friedrich Beckerle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:23
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/06; E01C13/065; C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08L; C08L21/00; C08L9/00; E01C7/00; E01C7/08; E01C7/30
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |