US2499283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibited hydrochloric acid
Assignee: Dow Chemical Co
•
Filing: 1948-01-26
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Granted: 1950-02-28
•
Expires: 1968-01-26
Abstract
No abstract record available.
Inventors
- 👤 Harold A Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:09
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A COMPOSITION FOR TREATING A FERROUS METAL SURFACE COMPRISING 5 TO 25 PER CENT OF HC1, 0.1 TO 2 PER CENT OF A WATER-SOLUBLE ORGANIC RING NITROGENBASE SELECTED FROM THE GROUP CONSISTING OF ACRIDINE, PYRIDINE, QUINOLINES AND THEIR HOMOLOGUES, AND 0.1 TO 2 PER CENT OF PHENYL HYDRAZINE, THE BALANCE BEING WATER.
Claim 2
Dependent Claim
52 words
A COMPOSITION FOR TREATING A FERROUS METAL SURFACE COMPRISING 5 TO 25 PER CENT OF HC1, 0.1 TO 2 PER CENT OF A WATER-SOLUBLE ORGANIC RING NITROGENBASE SELECTED FROM THE GROUP CONSISTING OF ACRIDINE, PYRIDINE, QUINOLINES AND THEIR HOMOLOGUES, AND 0.1 TO 2 PER CENT OF PHENYL HYDRAZINE, THE BALANCE BEING WATER.
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) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |