US3025259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition comprising rubber and chemically modified carbon black, and method for preparing same
Assignee: Dunlop Rubber Co Ltd
•
Filing: 1959-07-13
•
Granted: 1962-03-13
•
Expires: 1979-07-13
Abstract
No abstract record available.
Inventors
- 👤 Watson John William
- 👤 Kendall Charles Edwin
- 👤 Jervis Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:52
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
48 words
A CURED RUBBER COMPOSITION COMPRISING, IN ADMIXTURE, A RUBBER AND CARBON BLACK HAVING HYDROCARBON GROUPS CHEMICALLY ATTACHED TO THE SURFACE OF THE CARBON BLACK, AT LEAST ONE CARBON ATOM OF EACH HYDROCARBON GROUP BEING BONDED DIRECTLY TO A CARBON ATOM FORMING PART OF THE SURFACE OF THE BLACK.
Claim 2
Dependent Claim
48 words
A CURED RUBBER COMPOSITION COMPRISING, IN ADMIXTURE, A RUBBER AND CARBON BLACK HAVING HYDROCARBON GROUPS CHEMICALLY ATTACHED TO THE SURFACE OF THE CARBON BLACK, AT LEAST ONE CARBON ATOM OF EACH HYDROCARBON GROUP BEING BONDED DIRECTLY TO A CARBON ATOM FORMING PART OF THE SURFACE OF THE BLACK.
Claim 3
Dependent Claim
19 words
A CURED RUBBER COMPOSITION ACCORDING TO CLAIM 1 IN WHICH THE RUBBER IS A COPOLYMER OF BUTADIENE AND STYRENE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |