Patent US3251776A successfully refreshed from Google Patents.
US3251776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rust inhibitors for aqueous solutions
Assignee: ExxonMobil Oil Corp
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Filing: 1964-04-21
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Granted: 1966-05-17
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Expires: 1984-04-21
Abstract
No abstract record available.
Inventors
- 👤 Paul Y C Gee
- 👤 Jr Harry J Andress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:21
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A METHOD FOR INHIBITING RUSTING OF FERROUS METAL SURFACES IN A COOLING SYSTEM OF THE TYPE THROUGH WHICH AN AQUEOUS COOLANT IS CIRCULATED, WHICH COMPRISES CONTACTING SAID METAL SURFACES ITH AN AQUEOUS COOLANT CONSISTING ESSENTIALLY OF WATER AND A SMALL AMOUNT, SUFFICIENT TO PREVENT RUSTING OF SAID METAL SURFACES, OF A SUCCINAMIC ACID HAVING THE FORMULA:
Claim 2
Independent Claim
56 words
A METHOD FOR INHIBITING RUSTING OF FERROUS METAL SURFACES IN A COOLING SYSTEM OF THE TYPE THROUGH WHICH AN AQUEOUS COOLANT IS CIRCULATED, WHICH COMPRISES CONTACTING SAID METAL SURFACES ITH AN AQUEOUS COOLANT CONSISTING ESSENTIALLY OF WATER AND A SMALL AMOUNT, SUFFICIENT TO PREVENT RUSTING OF SAID METAL SURFACES, OF A SUCCINAMIC ACID HAVING THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |