US2786879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coagulating rubber black masterbatch
Assignee: Phillips Petroleum Co
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Filing: 1953-01-12
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Granted: 1957-03-26
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Expires: 1973-01-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Kennedy
- 👤 Lester G Nabors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:34
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN THE PROCESS FOR THE PRODUCTION OF CRUMB RUBBER FROM CARBON BLACK-MASTERBATCHED LATEX BY CREAMING SAID LATEX WITH A SALT AND COAGULATING THE LATEX WITH DILUTE ACID THE IMPROVEMENT WHICH COMPRISES CREAMING SAID BLACK MASTERBATCHED WITH A CREAMING AGENT WHICH INCLUDES AN ALKALI METAL CARBONATE IN AN AMOUNT SUFFICIENT SO THAT CARBON DIOXIDE DERIVED THEREFROM WILL FLOAT RESULTING CRUMB RUBBER, COAGULATING SAID LATEX BY THE ADDITION OF A MINERAL ACID THERETO, AND CONCOMITANTLY FLOATING CRUMB RUBBER THUS FORMED BY THE USE OF CARBON DIOXIDE PASSING THROUGH SAID LATEX AND BEING LIBERATED FROM SAID ALKALI METAL CARBONATE BY AN ADDITIONAL AMOUNT AND ACID BEING ADDED AT A RATE SUFFICIENT TO RELEASE SAID CARBON DIOXIDE IN AN AMOUNT SUFFICIENT TO BRING ABOUT THE FLOATION.
Claim 2
Dependent Claim
122 words
IN THE PROCESS FOR THE PRODUCTION OF CRUMB RUBBER FROM CARBON BLACK-MASTERBATCHED LATEX BY CREAMING SAID LATEX WITH A SALT AND COAGULATING THE LATEX WITH DILUTE ACID THE IMPROVEMENT WHICH COMPRISES CREAMING SAID BLACK MASTERBATCHED WITH A CREAMING AGENT WHICH INCLUDES AN ALKALI METAL CARBONATE IN AN AMOUNT SUFFICIENT SO THAT CARBON DIOXIDE DERIVED THEREFROM WILL FLOAT RESULTING CRUMB RUBBER, COAGULATING SAID LATEX BY THE ADDITION OF A MINERAL ACID THERETO, AND CONCOMITANTLY FLOATING CRUMB RUBBER THUS FORMED BY THE USE OF CARBON DIOXIDE PASSING THROUGH SAID LATEX AND BEING LIBERATED FROM SAID ALKALI METAL CARBONATE BY AN ADDITIONAL AMOUNT AND ACID BEING ADDED AT A RATE SUFFICIENT TO RELEASE SAID CARBON DIOXIDE IN AN AMOUNT SUFFICIENT TO BRING ABOUT THE FLOATION.
References Cited (Backward Citations)
US2378695A
Cited
US2567909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |