US3562090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration damped sandwich systems
Assignee: Hoechst AG
•
Filing: 1968-11-18
•
Granted: 1971-02-09
•
Expires: 1988-11-18
Abstract
Abstract A VIBRATION DAMPED SANDWICH SYSTEM COMPRISING TWO HARD PLATES AND INTERPOSED BETWEEN THE PLATES A VIBRATION DAMPING INTERLAYER COMPRISING A GRAFT POLYMER OF STYRENE OR OPTIONALLY A MIXTURE OF STYRENE WITH A COPOLYMERIZABLE CARBOXYLIC ACID, FOR EXAMPLE ACRYLIC AND/OR METHACRYLIC ACID, OF COPOLYMERS OF 10 TO 30% BY WEIGHT OF VINYL ACETATE AND 90 AND 70% BY WEIGHT OF ETHYLENE.
Inventors
- 👤 Hermann Oberst
- 👤 Joachim Ebigt
- 👤 Gunther Duve
- 👤 Alfred Schommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:06
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/98; C; C08; C08F; C08F255/00; C08F255/02; C08F255/026; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |