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US3288555A
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Method of inhibiting corrosion
Assignee: ConocoPhillips Co
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Filing: 1965-02-05
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Granted: 1966-11-29
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Expires: 1985-02-05
Abstract
No abstract record available.
Inventors
- 👤 Donald R Napier
- 👤 Jr Olen L Riggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:39
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/20; C07C; C07C17/00; C07C17/26; C07C17/32; C07D215/00; C07D215/02; C07D215/04; C07D215/10; C07D217/00; C07D217/02; C07D217/10; C23; C23F; C23F11/00; C23F11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A METHOD OF INHIBITING THE ATTACK OF MINERAL ACIDS ON METAL SURFACES WHICH COMPRISES ADDING TO THE MINERAL ACID AN INHIBITING AMOUNT OF A SURFACE ACTIVE QUANTERNARY AMMONIUM COMPOUND REPRESENTED BY THE FORMULA
Claim 2
Independent Claim
33 words
A METHOD OF INHIBITING THE ATTACK OF MINERAL ACIDS ON METAL SURFACES WHICH COMPRISES ADDING TO THE MINERAL ACID AN INHIBITING AMOUNT OF A SURFACE ACTIVE QUANTERNARY AMMONIUM COMPOUND REPRESENTED BY THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |