US2806833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Promoting reaction of butyl rubber and carbon black with halogen
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-09-26
•
Granted: 1957-09-17
•
Expires: 1975-09-26
Abstract
No abstract record available.
Inventors
- 👤 Harold M Leeper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:52
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; C08F8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS WHICH COMPRISES HEATING A RUBBERY COPOLYMER OF AT LEAST 85% ISOBUTYLENE AND A MINOR AMOUNT OF A CONJUGATED DIENE HYDROCARBON WITH A RELATIVELY LARGE AMOUNT OF CARBON BLACK AND A SMALL AMOUNT SUFFICIENT TO INCREASE THE MODULUS AND LOWER THE TORSIONAL HYSTERESIS OF THE VULCANIZATE OF A HALOGEN AT 250-370*F. AND THEN MASTICATING THE MIXTURE.
Claim 2
Dependent Claim
57 words
A PROCESS WHICH COMPRISES HEATING A RUBBERY COPOLYMER OF AT LEAST 85% ISOBUTYLENE AND A MINOR AMOUNT OF A CONJUGATED DIENE HYDROCARBON WITH A RELATIVELY LARGE AMOUNT OF CARBON BLACK AND A SMALL AMOUNT SUFFICIENT TO INCREASE THE MODULUS AND LOWER THE TORSIONAL HYSTERESIS OF THE VULCANIZATE OF A HALOGEN AT 250-370*F. AND THEN MASTICATING THE MIXTURE.
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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |