US2698320A
Expired / Lapsed
US
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Method for polymerizing with powedered alcl3
Assignee: Standard Oil Development Co
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Filing: 1952-11-26
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Granted: 1954-12-28
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Expires: 1972-11-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Garabrant
- 👤 Hans G Goering
- 👤 Helmuth G Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:55
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/908; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
PROCESS FOR POLYMERIZING ISOBUTYLENE WHICH COMPRISES AGITATING THE ISOBUTYLENE AT A PROPELLER SPEED OF AT LEAST ABOUT 5000 RPM WITH .05% TO 1.0% BY WEIGHT OF FINELY DIVIDED SOLID ALUMINUM CHLORIDE HAVING A PARTICLE SIZE OF LESS THAN 0.2 MM. AT A TEMPERATURE BETWEEN -67* F. AND +32* F.
Claim 2
Dependent Claim
49 words
PROCESS FOR POLYMERIZING ISOBUTYLENE WHICH COMPRISES AGITATING THE ISOBUTYLENE AT A PROPELLER SPEED OF AT LEAST ABOUT 5000 RPM WITH .05% TO 1.0% BY WEIGHT OF FINELY DIVIDED SOLID ALUMINUM CHLORIDE HAVING A PARTICLE SIZE OF LESS THAN 0.2 MM. AT A TEMPERATURE BETWEEN -67* F. AND +32* F.
References Cited (Backward Citations)
US2243658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |