US2720499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber-carbon black treatment
Assignee: Uniroyal Inc
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Filing: 1952-11-12
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Granted: 1955-10-11
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Expires: 1972-11-12
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Doak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS WHICH COMPRISES MIXING RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, SYNTHETIC RUBBERY ALIPHATIC CONJUGATED DIOLEFIN POLYMERS AND SYNTHETIC RUBBERY COPOLYMERS OF ALIPHATIC CONJUGATED DIOLEFINS AND OTHER UNSATURATED COPOLYMERIZABLE MATERIAL WITH A RELATIVELY LARGE AMOUNT OF RUBBER-REINFORCING CARBON BLACK AND FROM 0.5 TO 3.0 PARTS OF HEXACHLOROCYCLOPENTADIENE PER 100 PARTS OF SAID RUBBER, HEATING THE MIXTURE AT A TEMPERATURE ABOVE 275* F., AT WHICH THE RUBBER IS NOT HARMED, THEREAFTER INCORPORATING VULCANIZING AND OTHER DESIRED INGREDIENTS, SHAPING THE MASS, AND VULCANIZING THE RESULTING SHAPED MASS.
Claim 2
Dependent Claim
88 words
A PROCESS WHICH COMPRISES MIXING RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, SYNTHETIC RUBBERY ALIPHATIC CONJUGATED DIOLEFIN POLYMERS AND SYNTHETIC RUBBERY COPOLYMERS OF ALIPHATIC CONJUGATED DIOLEFINS AND OTHER UNSATURATED COPOLYMERIZABLE MATERIAL WITH A RELATIVELY LARGE AMOUNT OF RUBBER-REINFORCING CARBON BLACK AND FROM 0.5 TO 3.0 PARTS OF HEXACHLOROCYCLOPENTADIENE PER 100 PARTS OF SAID RUBBER, HEATING THE MIXTURE AT A TEMPERATURE ABOVE 275* F., AT WHICH THE RUBBER IS NOT HARMED, THEREAFTER INCORPORATING VULCANIZING AND OTHER DESIRED INGREDIENTS, SHAPING THE MASS, AND VULCANIZING THE RESULTING SHAPED MASS.
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) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |