Patent US2981643A successfully refreshed from Google Patents.
US2981643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for descaling and decontaminating metals
Assignee: Individual
•
Filing: 1958-02-19
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Granted: 1961-04-25
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Expires: 1978-02-19
Abstract
No abstract record available.
Inventors
- 👤 Russell D Baybarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:10
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08; C23G1/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS FOR REMOVING OXIDES FROM THE SURFACE OF STAINLESS STEEL WHICH COMPRISES CONTACTING THE METAL IN AN ATMOSPHERE INERT TO CHROMOUS SULFATE WITH A DILUTE AQUEOUS SULFURIC ACID SOLUTION CONTAINING CHROMOUS SULFATE.
Claim 2
Dependent Claim
33 words
A PROCESS FOR REMOVING OXIDES FROM THE SURFACE OF STAINLESS STEEL WHICH COMPRISES CONTACTING THE METAL IN AN ATMOSPHERE INERT TO CHROMOUS SULFATE WITH A DILUTE AQUEOUS SULFURIC ACID SOLUTION CONTAINING CHROMOUS SULFATE.
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |