US2554358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for cleaning metals
Assignee: Birco Chemical Corp
•
Filing: 1948-10-16
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Granted: 1951-05-22
•
Expires: 1968-10-16
Abstract
No abstract record available.
Inventors
- 👤 John P Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:27
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
A CLEANING MATERIAL FOR REMOVING OXIDES SCALE AND OTHER FOREIGN MATERIAL FROM METAL SURFACES FORMED BY ADDING, WITH STIRRING, APPROXIMATELY 30 PARTS BY VOLUME OF 10% AQUEOUS SOLUTION OF SODIUM SILICATE TO A MIXTURE CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF APPROXIMATELY 60 PARTS BY VOLUME OF HYDROCHLORIC ACID (SPECIFIC GRAVITY 1.19), APPROXIMATELY 5 PARTS VOLUME OF PHOSPHORIC ACID (AQUEOUS SOLUTION, 75% STRENGTH BY WEIGHT), APPROXIMATELY 5 PARTS BY VOLUME OF COPER SULFATE(AQUEOUS SOLUTION, 25% STRENGTH BY WEIGTH), AND APPROXIMATELY 1% BY VOLUME OF GLYCERINE.
References Cited (Backward Citations)
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Cited
US1329573A
Cited
US1713653A
Cited
US1980518A
Cited
US2030601A
Cited
DE705213C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |