US2728727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for inhibiting corrosion
Assignee: Pure Oil Co
•
Filing: 1952-06-19
•
Granted: 1955-12-27
•
Expires: 1972-06-19
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:20
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A COMPOSITION OF MATTER COMPRISING AN AQUEOUS HYDROFLUORIC ACID-CONTAINING SOLUTION AND A SOLUBLE CORROSION INHIBITOR COMPRISING BETWEEN ABOUT 0.5 TO 1.0 WEIGHT PER CENT OF A TRIVALENT ARSENIC COMPOUND AND BETWEEN ABOUT 0.5 TO 1.0 WEIGHT PER CENT OF A THIOUREA COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL AND ALKYL ARYL THIOUREAS.
Claim 2
Dependent Claim
54 words
A COMPOSITION OF MATTER COMPRISING AN AQUEOUS HYDROFLUORIC ACID-CONTAINING SOLUTION AND A SOLUBLE CORROSION INHIBITOR COMPRISING BETWEEN ABOUT 0.5 TO 1.0 WEIGHT PER CENT OF A TRIVALENT ARSENIC COMPOUND AND BETWEEN ABOUT 0.5 TO 1.0 WEIGHT PER CENT OF A THIOUREA COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL AND ALKYL ARYL THIOUREAS.
References Cited (Backward Citations)
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Cited
US1877504A
Cited
US2215092A
Cited
US2225965A
Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |