Patent US2398348A successfully refreshed from Google Patents.
US3585136A
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Corrosion inhibition of aqueous solutions of inorganic mineral acids
Assignee: ChampionX LLC
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Filing: 1968-03-04
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Granted: 1971-06-15
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Expires: 1988-03-04
Abstract
Abstract AQUEOUS SOLUTIONS OF INORGANIC MINERAL ACIDS ARE INHIBITED AGAINST THEIR CORROSIVE TENDENCIES BY THE ADDITION THERETO OF FROM 0.001 TO 2% BY VOLUME OF A COMPOSITION COMPRISING: (A) A MANNICH REACTION CONDENSATION PRODUCT FORMED BY REACTING ONE MOLE OF HYDROABIETYL AMINE WITH TWO MOLES OF FORMALDEHYDE AND TWO MOLES OF AN ALDEHYDE CONTAINING FROM TWO TO SIX CARBON ATOMS AND AT LEAST ONE HYDROGEN ATOM ON THE CARBON ATOM ADJACENT TO THE ALDEHYDIC CARBONYL CARBON ATOM, AND (B) AN ACETYLENIC ALCHOL WHICH CONTAINS THREE TO TWELVE CARBON ATOMS WITH THE RATIO OF A:B BEING WITHIN THE RANGE OF FROM 5:1 TO 1:5.
Inventors
- 👤 James R Standford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:53
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/22; C11D7/32; C11D7/3236; C11D3/00; C11D3/16; C11D3/164; C11D7/02; C11D7/04; C11D7/08; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/063; Y; Y10; Y10S; Y10S507/00; Y10S507/933; 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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |