US2952656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of incorporating carbon black in a polymer of ethylene or propylene
Assignee: Individual
•
Filing: 1957-07-16
•
Granted: 1960-09-13
•
Expires: 1977-07-16
Abstract
No abstract record available.
Inventors
- 👤 Zomlefer Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:22
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/212; C08J2323/00; C08J2323/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD FOR PREPARING A HOMOGENEOUSLY DISPERSED, UNIFIED, STABLE, NON-PHASING MOLDABLE COMPOSITION OF FINELY-DIVIDED CARBON BLACK AND A POLYMER SELECTED FROM THE GROUP CONSISTING OF SOLID HOMOPOLYMERS OF ETHYLENE SOLID HOMOPOLYMERS OF PROPYLENE, SOLID COPOLYMERS OF ETHYLENE AND PROPYLENE, AND MIXTURES THEREOF, COMPRISING PROVIDING A CONSTANTLY AGITATED THIN SOLUTION OF NO MORE THAN 25 PERCENT BY WEIGHT OF THE POLYMER IN A SOLVENT AT A TEMPERATURE ABOVE THE GEL POINT, MAINTAINING STIRRING WHILE ADDING 1 TO 60 PERCENT OF CARBON BLACK BY WEIGHT OF THE POLYMER UNTIL DISPERSED, COOLING THE MIXTURE TO ITS GEL POINT WHILE MAINTAINING STIRRING AND REMOVING THE SOLVENT.
Claim 2
Independent Claim
102 words
A METHOD FOR PREPARING A HOMOGENEOUSLY DISPERSED, UNIFIED, STABLE, NON-PHASING MOLDABLE COMPOSITION OF FINELY-DIVIDED CARBON BLACK AND A POLYMER SELECTED FROM THE GROUP CONSISTING OF SOLID HOMOPOLYMERS OF ETHYLENE SOLID HOMOPOLYMERS OF PROPYLENE, SOLID COPOLYMERS OF ETHYLENE AND PROPYLENE, AND MIXTURES THEREOF, COMPRISING PROVIDING A CONSTANTLY AGITATED THIN SOLUTION OF NO MORE THAN 25 PERCENT BY WEIGHT OF THE POLYMER IN A SOLVENT AT A TEMPERATURE ABOVE THE GEL POINT, MAINTAINING STIRRING WHILE ADDING 1 TO 60 PERCENT OF CARBON BLACK BY WEIGHT OF THE POLYMER UNTIL DISPERSED, COOLING THE MIXTURE TO ITS GEL POINT WHILE MAINTAINING STIRRING AND REMOVING THE SOLVENT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |