US2801234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing olefin polymer from process equipment
Assignee: Phillips Petroleum Co
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Filing: 1955-03-11
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Granted: 1957-07-30
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Expires: 1975-03-11
Abstract
No abstract record available.
Inventors
- 👤 George E Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:16
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; C08J11/08; C08F; C08F36/00; C08F36/02; C08F36/04; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD FOR REMOVING A POLYMER OF A STRAIGHT CHAIN OLEFINIC HYDROCARBON FROM PROCESS EQUIPMENT, WHICH COMPRISES CONTACTING SAID POLYMER WITH A SOLVENT CONSISTING ESSENTIALLY OF BRANCHES CHAIN PARAFFIN HYDROCARBONS BOILING IN THE RANGE OF 350* TO 600*F. AT ELEVATED TEMPERATURES FOR A PERIOD OF TIME SUFFICIENT TO REMOVE SAID POLYMER.
Claim 2
Independent Claim
51 words
A METHOD FOR REMOVING A POLYMER OF A STRAIGHT CHAIN OLEFINIC HYDROCARBON FROM PROCESS EQUIPMENT, WHICH COMPRISES CONTACTING SAID POLYMER WITH A SOLVENT CONSISTING ESSENTIALLY OF BRANCHES CHAIN PARAFFIN HYDROCARBONS BOILING IN THE RANGE OF 350* TO 600*F. AT ELEVATED TEMPERATURES FOR A PERIOD OF TIME SUFFICIENT TO REMOVE SAID POLYMER.
References Cited (Backward Citations)
US2455665A
Cited
US2580019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |