US3793401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polymer blends
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1970-11-27
•
Granted: 1974-02-19
•
Expires: 1990-11-27
Abstract
Abstract THE USE OF UP TO 20% BY WEIGHT OF ORGANIC ANHYDRIDES AS STABILIZERS IN POLYMER COMPOSITIONS CONTAINING AT LEAST 50 MOLE PERCENT OF POLYMERIZED UNSATURATED NITRILES SUCH AS ACRYLONTRILE AND METHACRYLONITRILE, AND AT LEAST 5% BY WEIGHT OF A DIENE RUBBER. THE ANHYDRIDES ARE SELECTED FROM ANHYDRIDES OF CYCLIC DICARBOXYLIC ACIDS, POLYMERIC ANHYDRIDES AND POLYMERIC ACIDS WHICH LOSE WATER ON HEATING TO FORM POLYMERIC ANHYDRIDES.
Inventors
- 👤 E Nield
- 👤 P Staniland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:07
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535; C08K5/1539; C08F; C08F279/00; C08F279/02; C08L; C08L33/00; C08L33/18; C08L33/20; C08L51/00; C08L51/04
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |