Patent US3070548A successfully refreshed from Google Patents.
US3070548A
Expired / Lapsed
US
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Removal of polymerized materials from surfaces
Assignee: Phillips Petroleum Co
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Filing: 1958-10-10
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Granted: 1962-12-25
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Expires: 1978-10-10
Abstract
No abstract record available.
Inventors
- 👤 Jesse M Brooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:24
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD FOR REMOVING FROM PROCESS EQUIPMENT BUTADIENE AND CYCLOPENTADIENE POLYMERIC DEPOSITS WHICH COMPRISES CONTACTING SAID DEPOSITS WITH A MIXTURE CONSISTING OF FROM 10 TO 50 VOLUME PERCENT OF METHYLENE DICHLORIDE AND THE REMAINDER A LIGHT HYDROCARBON OIL HAVING A BOILING RANGE FROM 350 TO 525*F. UNTIL SAID DEPOSIT SLOUGHS-OFF THE SURFACES OF SAID EQUIPMENT, AND REMOVING SAID SLOUGHED-OFF DEPOSITS FROM SAID EQUIPMENT.
Claim 2
Independent Claim
63 words
A METHOD FOR REMOVING FROM PROCESS EQUIPMENT BUTADIENE AND CYCLOPENTADIENE POLYMERIC DEPOSITS WHICH COMPRISES CONTACTING SAID DEPOSITS WITH A MIXTURE CONSISTING OF FROM 10 TO 50 VOLUME PERCENT OF METHYLENE DICHLORIDE AND THE REMAINDER A LIGHT HYDROCARBON OIL HAVING A BOILING RANGE FROM 350 TO 525*F. UNTIL SAID DEPOSIT SLOUGHS-OFF THE SURFACES OF SAID EQUIPMENT, AND REMOVING SAID SLOUGHED-OFF DEPOSITS FROM SAID EQUIPMENT.
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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |