US2897168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of increasing the particle size of synthetic rubber latex polymerizate
Assignee: Uniroyal Inc
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Filing: 1955-05-02
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Granted: 1959-07-28
•
Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Robert W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:50
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/02; C08C1/065; Y; Y10; Y10S; Y10S260/00; Y10S260/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
THE METHOD OF INCREASING THE PARTICLE SIZE OF A BUTADIENE POLYMER SYNTHETIC RUBBER LATEX HAVING A WEIGHT RATIO OF SYNTHETIC RUBBER TO WATER PHASE IN THE RANGE FROM .5/1 TO 1.2/1 AND HAVING AN AVERAGE PARTICLE DIAMETER, BASED ON THE WEIGHT OF THE PARTICLES, OF FROM 600 TO 3000 ANGSTROM UNITS WHICH COMPRISES MIXING WATER-INSOLUBLE ORGANIC LIQUID SWELLING AGENT FOR THE SYNTHETIC RUBBER SELECTED FROM THE GROUP CONSISTING OFHYDROCARBONS AND HALOGENATED HLYDROCARBONS WITH THE LATEX IN AMOUNT TO INCREASE THE WEIGHT RATIO OF ORGANIC PHASE, VIZ, SYNTHETIC RUBBER AND SWELLING AGENT, TO WATER PHASE TO THE RANGE FROM 1.4/1 TO 3/1, MAINTAINING THE LATEX IN CONTACT WITH THE SWELLING AGENT AT A TEMPERATURE BETWEEN THE FREEZING POINT OF THE LATEX AND 100*C. WITHOUT FORMATION OF ADDITIONAL POLYMER UNTIL THE AVERAGE PARTICLES DIAMETER OF THE LATEX HAS INCREASED AT LEAST 300 ANGSTROM UNITS, AND REMOVING THE SWELLING AGENT.
Claim 2
Independent Claim
147 words
THE METHOD OF INCREASING THE PARTICLE SIZE OF A BUTADIENE POLYMER SYNTHETIC RUBBER LATEX HAVING A WEIGHT RATIO OF SYNTHETIC RUBBER TO WATER PHASE IN THE RANGE FROM .5/1 TO 1.2/1 AND HAVING AN AVERAGE PARTICLE DIAMETER, BASED ON THE WEIGHT OF THE PARTICLES, OF FROM 600 TO 3000 ANGSTROM UNITS WHICH COMPRISES MIXING WATER-INSOLUBLE ORGANIC LIQUID SWELLING AGENT FOR THE SYNTHETIC RUBBER SELECTED FROM THE GROUP CONSISTING OFHYDROCARBONS AND HALOGENATED HLYDROCARBONS WITH THE LATEX IN AMOUNT TO INCREASE THE WEIGHT RATIO OF ORGANIC PHASE, VIZ, SYNTHETIC RUBBER AND SWELLING AGENT, TO WATER PHASE TO THE RANGE FROM 1.4/1 TO 3/1, MAINTAINING THE LATEX IN CONTACT WITH THE SWELLING AGENT AT A TEMPERATURE BETWEEN THE FREEZING POINT OF THE LATEX AND 100*C. WITHOUT FORMATION OF ADDITIONAL POLYMER UNTIL THE AVERAGE PARTICLES DIAMETER OF THE LATEX HAS INCREASED AT LEAST 300 ANGSTROM UNITS, AND REMOVING THE SWELLING AGENT.
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) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |