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US3235484A
Expired / Lapsed
US
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Cracking processes
Assignee: Lubrizol Corp
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Filing: 1962-03-27
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Granted: 1966-02-15
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Expires: 1982-03-27
Abstract
No abstract record available.
Inventors
- 👤 John M Colfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:22
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/234; C10L1/238; C10L1/2383; C10G; C10G35/00; C10G9/00; C10G9/14; C10G9/16; C10L1/221; C10L1/2387
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A METHOD FOR INHIBITING THE ACCUMULATION OF CARBONACEOUS MATERIAL IN A REFINERY CRACKING UNIT DURING THE CRACKING OF A HYDROCARBON FEED STOCK THEREIN WHICH COMPRISES DISSOLVING IN SAID FEED STOCK A MINOR PROPORTION OF AN OIL-SOLUBLE ACYLATED AMINE PREPARED BY MIXING A SUBSTITUTED SUCCINIC COMPOUND SELECTED FROM THE CLASS CONSISTING OF SUBSTITUTED SUCCINIC ACIDS HAVING THE STRUCTURAL FORMULA
Claim 2
Independent Claim
58 words
A METHOD FOR INHIBITING THE ACCUMULATION OF CARBONACEOUS MATERIAL IN A REFINERY CRACKING UNIT DURING THE CRACKING OF A HYDROCARBON FEED STOCK THEREIN WHICH COMPRISES DISSOLVING IN SAID FEED STOCK A MINOR PROPORTION OF AN OIL-SOLUBLE ACYLATED AMINE PREPARED BY MIXING A SUBSTITUTED SUCCINIC COMPOUND SELECTED FROM THE CLASS CONSISTING OF SUBSTITUTED SUCCINIC ACIDS HAVING THE STRUCTURAL FORMULA
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |