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Patent US3567623A successfully refreshed from Google Patents.
US3567623A
Expired / Lapsed
US
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Antifoulant agents for petroleum hydrocarbons
Assignee: Veolia WTS USA Inc
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Filing: 1969-02-10
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Granted: 1971-03-02
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Expires: 1989-02-10
Abstract
Abstract THE PRESENT INVENTION CONCERNS A METHOD FOR REDUCING OR ELIMINATING FOULING DEPOSITS WHICH ARE ENCOUNTERED IN THE PROCESSING OR PURIFICATION OF CRUDE HYDROCARBONS, HYDROCARBON STREAMS, PETROCHEMICALS, ETC., AND IN PARTICULAR TO METHODS FOR PREVENTING THE DEPOSITION OF FOULING DEPOSITS WHEREIN ELEVATED TEMPERATURES ARE USED. THIS OBJECTIVE IS ACHIEVED BY THE ADDITION OF AN ANTIFOULING AMOUNT OF THE PRODUCT OBTAINED BY REACTING AN ALKYLENE POLYAMINE-ALIPHATIC CARBOXYLIC ACID REACTION PRODUCT WITH A LOWER ALDEHYDE TO THE MATERIAL BEING PROCESSED.
Inventors
- 👤 Dennis J Hagney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:31
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/16; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/221
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |