US2697694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of high molecular weight polybutenes
Assignee: Standard Oil Co
•
Filing: 1950-10-28
•
Granted: 1954-12-21
•
Expires: 1970-10-28
Abstract
No abstract record available.
Inventors
- 👤 Shalit Harold
- 👤 Arthur P Lien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:46
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF EFFECTING OELFIN POLYMERIZATION, WHICH METHOD COMPRISES CONTACTING AN OLEFIN CHARGING STOCK AT A TEMPERATURE BELOW -25* C. WITH A CATALYST CONSISTING ESSENTIALLY OF A HOMOGENEOUS KETONE-ALUMINUM CHLORIDE MIXTURE CONTAINING MORE ALUMINUM CHLORIDE THAN WOULD BE REQUIRED TO PRODUCE A SOLID KETONE-ALUMINUM CHLORIDE COMPLEX AND SUFFICIENT ALUMINUM CHLORIDE TO PRODUCE A HOMOGENEOUS LIQUID MIXTURE CONTAINING MORE THAN ABOUT 55 WEIGHT PER CENT ALUMINUM CHLORIDE BUT NOT MORE THAN ABOT 73 WEIGHT PER CENT ALUMINUM CHLORIDE, SAID KETONE BEING SELECTED FROM THE CLASS CONSISTING OF ACETONE AND METHYLETHYL KETONE.
Claim 2
Independent Claim
90 words
THE METHOD OF EFFECTING OELFIN POLYMERIZATION, WHICH METHOD COMPRISES CONTACTING AN OLEFIN CHARGING STOCK AT A TEMPERATURE BELOW -25* C. WITH A CATALYST CONSISTING ESSENTIALLY OF A HOMOGENEOUS KETONE-ALUMINUM CHLORIDE MIXTURE CONTAINING MORE ALUMINUM CHLORIDE THAN WOULD BE REQUIRED TO PRODUCE A SOLID KETONE-ALUMINUM CHLORIDE COMPLEX AND SUFFICIENT ALUMINUM CHLORIDE TO PRODUCE A HOMOGENEOUS LIQUID MIXTURE CONTAINING MORE THAN ABOUT 55 WEIGHT PER CENT ALUMINUM CHLORIDE BUT NOT MORE THAN ABOT 73 WEIGHT PER CENT ALUMINUM CHLORIDE, SAID KETONE BEING SELECTED FROM THE CLASS CONSISTING OF ACETONE AND METHYLETHYL KETONE.
References Cited (Backward Citations)
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Cited
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US2422798A
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US2520439A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |