Patent US5870702A successfully refreshed from Google Patents.
US2632718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of descaling ferrous metals
Assignee: Individual
•
Filing: 1946-08-21
•
Granted: 1953-03-24
•
Expires: 1966-08-21
Abstract
No abstract record available.
Inventors
- 👤 Nathan H Brodell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:00
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/82; C23; C23G; C23G1/00; C23G1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A METHOD OF DESCALING FERROUS METAL ARTICLES, THE STEPS WHICH CONSIST IN IMMERSING THE ARTICLES IN A SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPLETELY OXIDIZED POLYVALENT METALLIC HALDES AND ALIPHATIC AND AROMATIC POLYHALIDES TO FORM A COATING OF SAID COMPOUND ON SAID ARTICLE, THEN HEATING THE ARTICLES TO A TEMPERATURE SUCH THAT A CHEMICAL CHANGE IN THE COATING LOOSENS THE SCALE ON SAID ARTICLES, AND THEN QUENCHING THE ARTICLES IN A SOLUTION OF A COMPOUND WHICH BREAKS THE SCALE AWAY FROM THE ARTICLES.
Claim 2
Dependent Claim
88 words
IN A METHOD OF DESCALING FERROUS METAL ARTICLES, THE STEPS WHICH CONSIST IN IMMERSING THE ARTICLES IN A SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPLETELY OXIDIZED POLYVALENT METALLIC HALDES AND ALIPHATIC AND AROMATIC POLYHALIDES TO FORM A COATING OF SAID COMPOUND ON SAID ARTICLE, THEN HEATING THE ARTICLES TO A TEMPERATURE SUCH THAT A CHEMICAL CHANGE IN THE COATING LOOSENS THE SCALE ON SAID ARTICLES, AND THEN QUENCHING THE ARTICLES IN A SOLUTION OF A COMPOUND WHICH BREAKS THE SCALE AWAY FROM THE ARTICLES.
References Cited (Backward Citations)
US33844A
Cited
US1373573A
Cited
US1898809A
Cited
US2043300A
Cited
US2347742A
Cited
US2353019A
Cited
US2291202A
Cited
US2338165A
Cited
US2380284A
Cited
US2442350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |