Patent US3145189A successfully refreshed from Google Patents.
US3145189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making freely flowable rubber compositions
Assignee: Primerica Inc
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Filing: 1960-12-23
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Granted: 1964-08-18
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Expires: 1980-12-23
Abstract
No abstract record available.
Inventors
- 👤 Fourier Walter Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:01
CPC Classifications
C; C08; C08L; C08L21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
227 words
A METHOD OF PREPARING A FREELY FLOWABLE RUBBER COMPOSITION CONSISTING ESSENTIALLY OF A HOMOGENEOUS TWOPHASE LIQUID MASS CONTAINING AS ITS SOLE RUBBERY INGREDIENTS TWO CLASSES OF RUBBERY ELASTIC POLYMERS, EACH CLASS HAVING DIFFERENT SOLUBILITY CHARACTERISTICS IN THE SAME SOLVENT AND A VOLATILE ORGANIC LIQUID WHICH IS A SOLVENT FOR ONE CLASS OF SAID POLYMERS AND A NON-SOLVENT FOR THE OTHER CLASS THEREOF, ONE CLASS OF SAID POLYMERS BEING DISSOLVED IN THE SOLVENT FORMING A SOLUTION WHICH COMPRISES THE EXTERNAL PHASE AND THE OTHER CLASS BEING DISPERSED AS FINE UNDISSOLVED PARTICLES IN SAID SOLUTION WHICH COMPRISES THE INTERNAL PHASE, COMPRISING THE STEPS OF: INTIMATELY MIXING A LATEX OF SAID SOLUBLE CLASS OF RUBBERY POLYMER WITH A LATEX OF SAID INSOLUBLE CLASS OF RUBBERY POLYMER; THE LATICES BEING MIXED IN A PROPORTION SUFFICIENT TO PROVIDE A WEIGHT RATIO OF SAID SOLUBLE CLASS OF RUBBERY POLYMER TO INSOLUBLE CLASS OF RUBBERY POLYMER OF AT LEAST ABOUT 1.5; COAGULATING SAID RUBBERY POLYMERS FROM SAID MIXED LATICES TO FORM A HOMOGENEOUS RUBBERY COAGULUM OF SAID SOLVENT SOLUBLE AND SAID SOLVENT INSOLUBLE POLYMERS IN SAID WEIGHT RATIO; SUBJECTING SAID COAGULUM TO NONMASTICATING AGITATION IN THE PRESENCE OF SAID ORGANIC LIQUID UNTIL THE SOLUBLE RUBBER IS DISSOLVED IN THE ORGANIC LIQUID AND THE INSOLUBLE RUBBER IS DISRUPTED AND DISPERSED IN THE FORM OF FINE DISCRETE PARTICLES SUSPENDED IN THE SOLUTION OF THE SOLUBLE RUBBER.
Claim 2
Independent Claim
227 words
A METHOD OF PREPARING A FREELY FLOWABLE RUBBER COMPOSITION CONSISTING ESSENTIALLY OF A HOMOGENEOUS TWOPHASE LIQUID MASS CONTAINING AS ITS SOLE RUBBERY INGREDIENTS TWO CLASSES OF RUBBERY ELASTIC POLYMERS, EACH CLASS HAVING DIFFERENT SOLUBILITY CHARACTERISTICS IN THE SAME SOLVENT AND A VOLATILE ORGANIC LIQUID WHICH IS A SOLVENT FOR ONE CLASS OF SAID POLYMERS AND A NON-SOLVENT FOR THE OTHER CLASS THEREOF, ONE CLASS OF SAID POLYMERS BEING DISSOLVED IN THE SOLVENT FORMING A SOLUTION WHICH COMPRISES THE EXTERNAL PHASE AND THE OTHER CLASS BEING DISPERSED AS FINE UNDISSOLVED PARTICLES IN SAID SOLUTION WHICH COMPRISES THE INTERNAL PHASE, COMPRISING THE STEPS OF: INTIMATELY MIXING A LATEX OF SAID SOLUBLE CLASS OF RUBBERY POLYMER WITH A LATEX OF SAID INSOLUBLE CLASS OF RUBBERY POLYMER; THE LATICES BEING MIXED IN A PROPORTION SUFFICIENT TO PROVIDE A WEIGHT RATIO OF SAID SOLUBLE CLASS OF RUBBERY POLYMER TO INSOLUBLE CLASS OF RUBBERY POLYMER OF AT LEAST ABOUT 1.5; COAGULATING SAID RUBBERY POLYMERS FROM SAID MIXED LATICES TO FORM A HOMOGENEOUS RUBBERY COAGULUM OF SAID SOLVENT SOLUBLE AND SAID SOLVENT INSOLUBLE POLYMERS IN SAID WEIGHT RATIO; SUBJECTING SAID COAGULUM TO NONMASTICATING AGITATION IN THE PRESENCE OF SAID ORGANIC LIQUID UNTIL THE SOLUBLE RUBBER IS DISSOLVED IN THE ORGANIC LIQUID AND THE INSOLUBLE RUBBER IS DISRUPTED AND DISPERSED IN THE FORM OF FINE DISCRETE PARTICLES SUSPENDED IN THE SOLUTION OF THE SOLUBLE RUBBER.
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |