US3087778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibiting
Assignee: Chemical Construction Corp
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Filing: 1961-02-17
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Granted: 1963-04-30
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Expires: 1981-02-17
Abstract
No abstract record available.
Inventors
- 👤 John S Negra
- 👤 Jack W Mccloskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:15
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
METHOD OF INHIBITING CORROSION OF FERROUS METAL SURFACES BY A STRONG AQUEOUS POTASSIUM CABONATE SOLUTION CONTAINING DISSOLVED CABON DIOXID TOGETHER WITH A MINOR PROPORTION OF HYDROGEN SULFIDE, SAID SOLUTION HAVING A CARBONATE CONCENTRATION OF AT LEAST 15%, WHICH COMPRISES INCORPORATING IN SAID SOLUTION FROM ABOUT 0.1% TO 0.5% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE TRIVALENT METALLIC OXIDES OF ARSENIC, ANTIMONY AND BISMUTH.
Claim 2
Dependent Claim
68 words
METHOD OF INHIBITING CORROSION OF FERROUS METAL SURFACES BY A STRONG AQUEOUS POTASSIUM CABONATE SOLUTION CONTAINING DISSOLVED CABON DIOXID TOGETHER WITH A MINOR PROPORTION OF HYDROGEN SULFIDE, SAID SOLUTION HAVING A CARBONATE CONCENTRATION OF AT LEAST 15%, WHICH COMPRISES INCORPORATING IN SAID SOLUTION FROM ABOUT 0.1% TO 0.5% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE TRIVALENT METALLIC OXIDES OF ARSENIC, ANTIMONY AND BISMUTH.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |