US2818383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting corrosion by oil well fluids
Assignee: Sunoco Inc
•
Filing: 1956-12-04
•
Granted: 1957-12-31
•
Expires: 1976-12-04
Abstract
No abstract record available.
Inventors
- 👤 Samuel E Jolly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:18
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
METHOD FOR INHIBITING CORROSION OF FERROUS METALS BY OIL WELL FLUIDS WHICH COMPRISES: INTRODUCING INTO NOR MALLY CORROSIVE OIL WELL FLUIDS, WHICH COME INTO CONTACT WITH FERROUS METAL, FATTY ACID SALTS OF PETROLEUM NAPHTHENYL AMINES HAVING THE FORMULA RCH2NH2, WHERE R IS A NAPHTHENYL RADICAL DERIVED FROM PETROLEUM NAPHTHENIC ACIDS RCOOH.
Claim 2
Dependent Claim
51 words
METHOD FOR INHIBITING CORROSION OF FERROUS METALS BY OIL WELL FLUIDS WHICH COMPRISES: INTRODUCING INTO NOR MALLY CORROSIVE OIL WELL FLUIDS, WHICH COME INTO CONTACT WITH FERROUS METAL, FATTY ACID SALTS OF PETROLEUM NAPHTHENYL AMINES HAVING THE FORMULA RCH2NH2, WHERE R IS A NAPHTHENYL RADICAL DERIVED FROM PETROLEUM NAPHTHENIC ACIDS RCOOH.
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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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |