US3706819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizable rubber composition comprising accelerator epdm and diolefin rubber
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1970-09-09
•
Granted: 1972-12-19
•
Expires: 1990-09-09
Abstract
Abstract BLENDS OF EPDM WITH HIGHLY UNSATURATED RUBBERS ARE CO-CURED WITH SULFUR USING AS ACCELERATORS HIGHER ALKYL THIURAM DISULFIEDS (E.G., TETRALAURYLTHIURAM DISULFIDE) OR BENZOTHIAZYLSULFENAMIDES (E.G., N-LAURYLBENZOTHIAZYLSULFENAMIDE).
Inventors
- 👤 Teruyoshi Usamoto
- 👤 Yasutaka Hatada
- 👤 Itsuro Furuichi
- 👤 Masao Matsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39; C08K5/40; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K5/0008; C08K5/0025; C08K5/04; C08K5/09; C08L; C08L21/00; C08L23/00; C08L23/02; C08L23/16; C08L91/00; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/04
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |