US3331793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion resistant vulcanizates comprising epd rubber, carbon black, and minor amounts of natural rubber or sbr
Assignee: EIDP Inc
•
Filing: 1964-05-25
•
Granted: 1967-07-18
•
Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 Souffie Robert David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:06
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08L; C08L23/00; C08L23/02; C08L23/16; C08K3/06; C08L2312/00; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/10; C08L2666/00; C08L2666/02; C08L2666/04; C08L53/00; C08L53/02; C08L7/00; C08L9/00; C08L9/06; C08L91/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A COMPOSITION CURABLE TO AN ABRASION-RESISTANT VULCANIZATE WHICH COMPRISES (1) 100 PARTS OF A SULFUR-CURABLE COPOLYMER OF ETHYLENE, PROPYLENE AND 1,4-HEXADIENE CONTAINING FROM 20 TO 160 PARTS OF CARBON BLACK, WHICH HAS BEEN HIGHLY SHEARED AT A TEMPERATURE OF AT LEAST 200*F. SUFFICIENT TO REDUCE THE MOONEY SCORCH MINIMUM, MEASURED AT 250*F., FROM ABOUT 5 TO 20 PERCENT, (2) ABOUT 1 TO 2 PARTS OF AN ADDITIVE RUBBER SELECTED FROM THE GROUP CONSISTING OF STYRENE-BUTADIENE RUBBER, NATURAL RUBBER, AND CIS-POLYISOPRENE RUBBER, AND (3) A SULFUR CURING SYSTEM IN AN AMOUNT EQUIVALENT TO THE AMOUNT OF ADDITIVE RUBBER.
Claim 2
Dependent Claim
97 words
A COMPOSITION CURABLE TO AN ABRASION-RESISTANT VULCANIZATE WHICH COMPRISES (1) 100 PARTS OF A SULFUR-CURABLE COPOLYMER OF ETHYLENE, PROPYLENE AND 1,4-HEXADIENE CONTAINING FROM 20 TO 160 PARTS OF CARBON BLACK, WHICH HAS BEEN HIGHLY SHEARED AT A TEMPERATURE OF AT LEAST 200*F. SUFFICIENT TO REDUCE THE MOONEY SCORCH MINIMUM, MEASURED AT 250*F., FROM ABOUT 5 TO 20 PERCENT, (2) ABOUT 1 TO 2 PARTS OF AN ADDITIVE RUBBER SELECTED FROM THE GROUP CONSISTING OF STYRENE-BUTADIENE RUBBER, NATURAL RUBBER, AND CIS-POLYISOPRENE RUBBER, AND (3) A SULFUR CURING SYSTEM IN AN AMOUNT EQUIVALENT TO THE AMOUNT OF ADDITIVE RUBBER.
References Cited (Backward Citations)
US2933480A
Cited
US3224985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |