Patent US3170865A successfully refreshed from Google Patents.
US3170865A
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Method of retarding deposition of coke in petroleum furnaces
Assignee: Dow Silicones Corp
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Filing: 1961-07-17
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Granted: 1965-02-23
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Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 James B Allen
- 👤 Douglas K Layne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:19
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/28; C10B; C10B43/00; C10B43/14; C10G; C10G9/00; C10G9/14; C10G9/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF EXTENDING THE FURNACE LIFE IN PETROLEUM FURNACES BY PREVENTING, OR DECREASING COKE ACCUMULATION IN THE FURNACE WHICH COMPRISES MIXING WITH THE PETROLEUM PRIOR TO HEATING IN THE FURNACE FROM .1 TO 100 PARTS PER MILLION OF A POLYMETHYLSILOXANE IN FLUID FORM, BASED ON THE WEIGHT OF THE PETROLEUM.
Claim 2
Independent Claim
51 words
A METHOD OF EXTENDING THE FURNACE LIFE IN PETROLEUM FURNACES BY PREVENTING, OR DECREASING COKE ACCUMULATION IN THE FURNACE WHICH COMPRISES MIXING WITH THE PETROLEUM PRIOR TO HEATING IN THE FURNACE FROM .1 TO 100 PARTS PER MILLION OF A POLYMETHYLSILOXANE IN FLUID FORM, BASED ON THE WEIGHT OF THE PETROLEUM.
References Cited (Backward Citations)
US2968616A
Cited
US2908624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |