US3758493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid imidazolines carboxylic acid salts of 1-aminoalkyl-2-polymerized carboxylic fatty
Assignee: Texaco Inc
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Filing: 1970-12-17
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Granted: 1973-09-11
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Expires: 1990-12-17
Abstract
Abstract NORMAL AND ACID SALTS OF SUBSTITUTED IMIDAZOLINES AND SATURATED ALIPHATIC MONO- AND DICARBOXYLIC ACIDS FOR USE IN COMPOSITIONS OF WATER SOLUBLE CORROSION INHIBITORS. CONTINUOUS OR INTERMITTENT APPLICATION OF LIQUID COATINGS OF THESE INHIBITORS ON METALS, PARTICULARLY FERROUS METALS IN CONTACT WITH SWEET AND SOUR PETROLIFEROUS WELL FLUIDS, FORM PERSISTENT FILMS WHICH AFFORD PROTECTION AGAINST CORROSION, EVEN AT ELEVATED TEMPERATURE.
Inventors
- 👤 J Maddox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:18
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/16; C09; C09K; C09K8/00; C09K8/54; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149; Y; Y10; Y10S; Y10S507/00; Y10S507/939
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |