US2688004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling the cure of synthetic polymers
Assignee: Standard Oil Development Co
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Filing: 1951-10-30
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Granted: 1954-08-31
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Expires: 1971-10-30
Abstract
No abstract record available.
Inventors
- 👤 William R Lewis
- 👤 Wilmer L Bird
- 👤 Leon B Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:51
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F210/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A PROCESS COMPRISING POLYMERIZING ISOBUTYLENE AT A TEMPERATURE BETWEEN - 50 AND -165* C. IN CONTACT WITH A FRIEDEL-CRAFTS CATALYST DISSOLVED IN AN ORGANIC NON-COMPLEX FORMING SOLVENT WHICH IS LIQUID AT THE REACTION TEMPERATURE TO FORM A POLYMER, DISCHARGING SAID POLYMER INTO WATER HEATED TO AT LEAST 60* C., SAID WATER CONTAINING A WATER-INSOLUBLE SAOP OF A SATURATED FATTY ACID HAVING 12 TO 20 CARBON ATOMS PER MOLECULE AND A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ZINC, MAGNESIUM, CALCIUM, STRONTIUM AND BARIUM IN ORDER TO FLASH OFF THE VOLATILE REACTION LIQUID AND MAINTAIN THE POLYMER IN FINELY DIVIDED FORM AS AN AQUEOUS SLURRY, AND RECOVERING SOLID POLYMER THEREFROM THE IMPROVEMENT WHICH COMPRISES MAINTAINING THE AQUEOUS SLURRY AT A PH BELOW 7.
Claim 2
Dependent Claim
124 words
IN A PROCESS COMPRISING POLYMERIZING ISOBUTYLENE AT A TEMPERATURE BETWEEN - 50 AND -165* C. IN CONTACT WITH A FRIEDEL-CRAFTS CATALYST DISSOLVED IN AN ORGANIC NON-COMPLEX FORMING SOLVENT WHICH IS LIQUID AT THE REACTION TEMPERATURE TO FORM A POLYMER, DISCHARGING SAID POLYMER INTO WATER HEATED TO AT LEAST 60* C., SAID WATER CONTAINING A WATER-INSOLUBLE SAOP OF A SATURATED FATTY ACID HAVING 12 TO 20 CARBON ATOMS PER MOLECULE AND A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ZINC, MAGNESIUM, CALCIUM, STRONTIUM AND BARIUM IN ORDER TO FLASH OFF THE VOLATILE REACTION LIQUID AND MAINTAIN THE POLYMER IN FINELY DIVIDED FORM AS AN AQUEOUS SLURRY, AND RECOVERING SOLID POLYMER THEREFROM THE IMPROVEMENT WHICH COMPRISES MAINTAINING THE AQUEOUS SLURRY AT A PH BELOW 7.
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) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |