US3025189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and process for removing heat scale from metal parts
Assignee: Purex Corp Ltd
•
Filing: 1958-12-10
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Granted: 1962-03-13
•
Expires: 1978-12-10
Abstract
No abstract record available.
Inventors
- 👤 Arden Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:31
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08; C23G1/088; C23G1/10; C23G1/14; C23G1/19
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
IN THE PROCESS OF REMOVAL OF HEAT SCALE ON A METAL OBJECT, THE STEP OF TREATING SAID OBJECT IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF NITRIC ACID AND AN ALIPHATIC HOXYDROXY CARBOXYLIC ACID OF THE GROUP CONSISTING OF TARTARTIC, CITRIC AND MALIC ACIDS.
Claim 2
Dependent Claim
43 words
IN THE PROCESS OF REMOVAL OF HEAT SCALE ON A METAL OBJECT, THE STEP OF TREATING SAID OBJECT IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF NITRIC ACID AND AN ALIPHATIC HOXYDROXY CARBOXYLIC ACID OF THE GROUP CONSISTING OF TARTARTIC, CITRIC AND MALIC ACIDS.
Claim 3
Dependent Claim
72 words
AN AQUEOUS ACID SOLUTION FOR REMOVAL OF HEAT SCALE FROM METAL PARTS WHICH CONSISTS ESSENTIALLY OF NITRIC ACID, AN ALIPHATIC HYDROXY CARBOXYLIC ACID OF THE GROUP CONSISTING OF TARTARIC, CITRIC AND MALIC ACIDS, AND A SOLUBLE COMPLEX FLUORIDE FORMING IN SOLUTION A COMPLEX ION OF FLUORINE AND AN ATOM OF AN ELEMENT HAVING A COORDINATION NUMBER OF 4 TO 7, THE FLUORINE ATOM IN SAID COMPLEX BEING COORDINATELY LINKED TO SAID ATOM.
Claim 4
Dependent Claim
72 words
AN AQUEOUS ACID SOLUTION FOR REMOVAL OF HEAT SCALE FROM METAL PARTS WHICH CONSISTS ESSENTIALLY OF NITRIC ACID, AN ALIPHATIC HYDROXY CARBOXYLIC ACID OF THE GROUP CONSISTING OF TARTARIC, CITRIC AND MALIC ACIDS, AND A SOLUBLE COMPLEX FLUORIDE FORMING IN SOLUTION A COMPLEX ION OF FLUORINE AND AN ATOM OF AN ELEMENT HAVING A COORDINATION NUMBER OF 4 TO 7, THE FLUORINE ATOM IN SAID COMPLEX BEING COORDINATELY LINKED TO SAID ATOM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |