US2676944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber processing in the presence of carbon black and an organic peroxide
Assignee: Uniroyal Inc
•
Filing: 1951-04-27
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Granted: 1954-04-27
•
Expires: 1971-04-27
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Doak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD OF MANUFACTURING RUBBER PRODUCTS HAVING LOW TORSIONAL HYSTERESIS AND HIGH ELECTRICAL RESISTIVITY WHICH COMPRISES INCORPORATING IN A WELL-BLENDED MIXTURE OF CONJUGATED DIENE POLYMER RUBBER AND A RUBBER-REINFORCING CARBON BLACK AN ORGANIC PEROXIDE WHICH DECOMPOSES IN NOT OVER 20 MINUTES IN THE RANGE OF TEMPERATURES FROM 200* F. TO 350* F., AT A TEMPERATURE INSUFFICIENTLY ELEVATED TO THERMALLY DECOMPOSE SAID PEROXIDE, SUBSEQUENTLY HEAT-TREATING THE MIXTURE AT A TEMPERATURE SUFFICIENTLY ELEVATED THAT SAID PEROXIDE IS THERMALLY DECOMPOSED BUT INSUFFICIENTLY ELEVATED TO SUBSTANTIALLY INJURE THE PROPERTIES OF THE RUBBER, CONTINUING SAID HEATTREATING FOR A TIME SUFFICIENT TO SUBSTANTIALLY LOWER THE TORSIONAL HYSTERESIS AND SUBSTANTIALLY INCREASE THE ELECTRICAL RESISTIVITY OF A VULCANIZATE OF THE RESULTING MIXTURE, MASTICATING THE MIXTURE AND COMPLETING THE INCORPORATION OF VULCANIZING AND OTHER DESIRED INGREDIENTS, SHAPING THE MASS, AND VULCANIZING THE RESULTING SHAPED MASS.
Claim 2
Independent Claim
136 words
A METHOD OF MANUFACTURING RUBBER PRODUCTS HAVING LOW TORSIONAL HYSTERESIS AND HIGH ELECTRICAL RESISTIVITY WHICH COMPRISES INCORPORATING IN A WELL-BLENDED MIXTURE OF CONJUGATED DIENE POLYMER RUBBER AND A RUBBER-REINFORCING CARBON BLACK AN ORGANIC PEROXIDE WHICH DECOMPOSES IN NOT OVER 20 MINUTES IN THE RANGE OF TEMPERATURES FROM 200* F. TO 350* F., AT A TEMPERATURE INSUFFICIENTLY ELEVATED TO THERMALLY DECOMPOSE SAID PEROXIDE, SUBSEQUENTLY HEAT-TREATING THE MIXTURE AT A TEMPERATURE SUFFICIENTLY ELEVATED THAT SAID PEROXIDE IS THERMALLY DECOMPOSED BUT INSUFFICIENTLY ELEVATED TO SUBSTANTIALLY INJURE THE PROPERTIES OF THE RUBBER, CONTINUING SAID HEATTREATING FOR A TIME SUFFICIENT TO SUBSTANTIALLY LOWER THE TORSIONAL HYSTERESIS AND SUBSTANTIALLY INCREASE THE ELECTRICAL RESISTIVITY OF A VULCANIZATE OF THE RESULTING MIXTURE, MASTICATING THE MIXTURE AND COMPLETING THE INCORPORATION OF VULCANIZING AND OTHER DESIRED INGREDIENTS, SHAPING THE MASS, AND VULCANIZING THE RESULTING SHAPED MASS.
References Cited (Backward Citations)
US2118601A
Cited
US2199099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |