US3463755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Black masterbatching butyl rubber
Assignee: Ashland LLC
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Filing: 1962-12-31
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Granted: 1969-08-26
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Robert A Forrester
- 👤 Kerwyn L Pietsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:06
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08J2323/00; C08J2323/02; C08J2323/18; C08J2323/20; C08J2323/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A METHOD OF PREPARING A READILY-PROCESSABLE MIXTURE OF CARBON BLACK AND A SYNTHETIC RUBBER-LIKE POLYMER WHICH IS A COPOLYMERIZATION PRODUCT FO A MAJOR PROPORTION OF ISOBUTYLENE AND A MINOR PROPORTION OF ISOPRENE WHICH COMPRISES: PREPARING THE POLYMER IN THE FORM OF A WATER-BEARING CRUMB; MIXING THE WATER-BEARING CRUMB WITH AN ORGANIC RUBBER SOLVENT CHARACTERIZED BY THE PROPERTY OF FORMING A SEPARATE PHASE WHEN MOXED WITH WATER AND ALLOWED TO STAND; LIMITING THE ORGANIC RUBBER SOLVENT ADDED TO SAID WATER-BEARING CRUMB TO AN AMOUNT WHICH IS ABLE TO WELL BUT NOT COMPLETELY DISSOLVE THE POLYMER; MIXING THE MIXTURE OF WATER-BEARING CRUMB AND RUBBER SOLVENT WITH AN AQUEOUS CARBON BLACK SLURRY IN SUFFICIENT AMOUNT TO PROVIDE IN THE RESULTANT MIXTURE A SOLVENT-TO-WATER RATIO IN THE RANGE OF ABOUT 50/50 TO ABOUT 75/25 BY WEIGHT; PERMITTING THE LAST-MENTIONED MIXTURE TO STRATIFY INTO A CARBON BLACK AND POLYMER-BEARING ORGANIC SOLVENT PHASE AND A SUBSTANTIALLY CLEAR AQUEOUS PHASE; SEPARATING THE PHASES; AND TREATING THE SOLVENT PHASE TO OBTAIN A DRY, HOMOGENEOUS CARBON BLACKPOLYMER MIXTURE.
Claim 2
Independent Claim
169 words
A METHOD OF PREPARING A READILY-PROCESSABLE MIXTURE OF CARBON BLACK AND A SYNTHETIC RUBBER-LIKE POLYMER WHICH IS A COPOLYMERIZATION PRODUCT FO A MAJOR PROPORTION OF ISOBUTYLENE AND A MINOR PROPORTION OF ISOPRENE WHICH COMPRISES: PREPARING THE POLYMER IN THE FORM OF A WATER-BEARING CRUMB; MIXING THE WATER-BEARING CRUMB WITH AN ORGANIC RUBBER SOLVENT CHARACTERIZED BY THE PROPERTY OF FORMING A SEPARATE PHASE WHEN MOXED WITH WATER AND ALLOWED TO STAND; LIMITING THE ORGANIC RUBBER SOLVENT ADDED TO SAID WATER-BEARING CRUMB TO AN AMOUNT WHICH IS ABLE TO WELL BUT NOT COMPLETELY DISSOLVE THE POLYMER; MIXING THE MIXTURE OF WATER-BEARING CRUMB AND RUBBER SOLVENT WITH AN AQUEOUS CARBON BLACK SLURRY IN SUFFICIENT AMOUNT TO PROVIDE IN THE RESULTANT MIXTURE A SOLVENT-TO-WATER RATIO IN THE RANGE OF ABOUT 50/50 TO ABOUT 75/25 BY WEIGHT; PERMITTING THE LAST-MENTIONED MIXTURE TO STRATIFY INTO A CARBON BLACK AND POLYMER-BEARING ORGANIC SOLVENT PHASE AND A SUBSTANTIALLY CLEAR AQUEOUS PHASE; SEPARATING THE PHASES; AND TREATING THE SOLVENT PHASE TO OBTAIN A DRY, HOMOGENEOUS CARBON BLACKPOLYMER MIXTURE.
References Cited (Backward Citations)
US2986547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |