US2606873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for removing scale deposits from ferrous metal surfaces
Assignee: Dow Chemical Co
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Filing: 1950-02-27
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Granted: 1952-08-12
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Expires: 1970-02-27
Abstract
No abstract record available.
Inventors
- 👤 Paul H Cardwell
- 👤 Louis H Eilers
- 👤 Billy P Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A COMPOSITION FOR REMOVING SCALE DEPOSITS FROM FERROUS METAL SURFACES COMPRISING AN AQUEOUS SOLUTION OF HYDROCHLORIC ACID CONTAINING BY WEIGHT FROM ABOUT 1 TO 30 PER CENT OF HCL, FROM ABOUT 0.05 TO 2 PER CENT OF AN ORGANIC NITROGEN BASE SELECTED FROM THE GROUP CONSISTING OF THE AROMATIC AND HETEROCYCLIC NITROGEN BASES, FROM ABOUT 0.002 TO 2 PER CENT OF HCHO, AND FROM ABOUT 0.02 TO 0.1 PER CENT OF A WETTING AGENT DISPERSIBLE IN THE SOLUTION, SAID WETTING AGENT BEING A COMPOUND OF THE GROUP CONSISTING OF SULFATED AND SULFONATED ORGANIC COMPOUNDS.
Claim 2
Dependent Claim
94 words
A COMPOSITION FOR REMOVING SCALE DEPOSITS FROM FERROUS METAL SURFACES COMPRISING AN AQUEOUS SOLUTION OF HYDROCHLORIC ACID CONTAINING BY WEIGHT FROM ABOUT 1 TO 30 PER CENT OF HCL, FROM ABOUT 0.05 TO 2 PER CENT OF AN ORGANIC NITROGEN BASE SELECTED FROM THE GROUP CONSISTING OF THE AROMATIC AND HETEROCYCLIC NITROGEN BASES, FROM ABOUT 0.002 TO 2 PER CENT OF HCHO, AND FROM ABOUT 0.02 TO 0.1 PER CENT OF A WETTING AGENT DISPERSIBLE IN THE SOLUTION, SAID WETTING AGENT BEING A COMPOUND OF THE GROUP CONSISTING OF SULFATED AND SULFONATED ORGANIC COMPOUNDS.
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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |