Patent US3185659A successfully refreshed from Google Patents.
US3185659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a graft polymer
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1961-01-03
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Granted: 1965-05-25
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Expires: 1981-01-03
Abstract
No abstract record available.
Inventors
- 👤 Richard G Adams
- 👤 William H Smyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:07
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PROCESS OF PREPARING A GRAFT COPOLYMER SOLUTION WHICH COMPRISES ADDING A SOLUTION OF A PEROXIDE CATALYST IN A MONOVINYL MONOMERIC CROSSLINKING AGENT OVER A 15 MINUTE PERIOD TO A SOLUTION OF AN OILY LIQUID POLYMER OF A C4 TO C6 CONJUGATED DIOLEFIN IN A HYDROCARBON SOLVENT MAINTAINED AT A TEMPERATURE OF ABOUT 115*C. AND MAINTAINING SAID TEMPERATURE FOR AN ADDITIONAL 20 MINUTES, COOLING THE SOLUTION TO ABOUT 100*C. AND WHILE AT SAID TEMPERATURE, ADDING A DIVINYL MONOMERIC COMPOUND, FOLLOWED BY AN ADDITIONAL AMOUNT OF A PEROXIDE CATALYST DISSOLVED IN A HYDROCARBON SOLVENT, OVER A 30 MINUTE PERIOD, COOLING THE ADMIXTURE TO A TEMPERATURE OF NO MORE THAN ABOUT 400*C. AND STRIPPING SUFFICIENT HYDROCARBON SOLVENT FROM THE RESULTANT SOLUTION TO OBTAIN A FINAL SOLUTION OF BETWEEN ABOUT 40 AND 60 WT. PERCENT NONVOLATILE MATERIAL.
Claim 2
Dependent Claim
134 words
A PROCESS OF PREPARING A GRAFT COPOLYMER SOLUTION WHICH COMPRISES ADDING A SOLUTION OF A PEROXIDE CATALYST IN A MONOVINYL MONOMERIC CROSSLINKING AGENT OVER A 15 MINUTE PERIOD TO A SOLUTION OF AN OILY LIQUID POLYMER OF A C4 TO C6 CONJUGATED DIOLEFIN IN A HYDROCARBON SOLVENT MAINTAINED AT A TEMPERATURE OF ABOUT 115*C. AND MAINTAINING SAID TEMPERATURE FOR AN ADDITIONAL 20 MINUTES, COOLING THE SOLUTION TO ABOUT 100*C. AND WHILE AT SAID TEMPERATURE, ADDING A DIVINYL MONOMERIC COMPOUND, FOLLOWED BY AN ADDITIONAL AMOUNT OF A PEROXIDE CATALYST DISSOLVED IN A HYDROCARBON SOLVENT, OVER A 30 MINUTE PERIOD, COOLING THE ADMIXTURE TO A TEMPERATURE OF NO MORE THAN ABOUT 400*C. AND STRIPPING SUFFICIENT HYDROCARBON SOLVENT FROM THE RESULTANT SOLUTION TO OBTAIN A FINAL SOLUTION OF BETWEEN ABOUT 40 AND 60 WT. PERCENT NONVOLATILE MATERIAL.
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) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |