US3352997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of refining surfacecontaminated metals
Assignee: Union Carbide Corp
•
Filing: 1965-02-09
•
Granted: 1967-11-14
•
Expires: 1985-02-09
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:54
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/18; H05B7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD OF CLEANING A SURFACE-CONTAMINATED METAL ARTICLE WHICH COMPRISES: (1) ARRANGING THE ARTICLE TO BE CLEANED IN CIRCUIT WITH AN ELECTRODE AND A SOURCE OF DIRECT CURRENT, THE ARTICLE TO BE CLEANED BEING CONNECTED AS A CATHODE AND THE ELECTRODE BEING CONNECTED AS AN ANODE (2) ESTABLISHING AN ARC BETWEEN THE ELECTRODE AND SURFACE-CONTAMINATED METAL ARTICLE AND (3) MOVING THE ARC OVER THE SURFACE OF THE METAL ARTICLE WHILE CONTINUOUSLY MOVING SAID METAL ARTICLE
Claim 2
Independent Claim
75 words
A METHOD OF CLEANING A SURFACE-CONTAMINATED METAL ARTICLE WHICH COMPRISES: (1) ARRANGING THE ARTICLE TO BE CLEANED IN CIRCUIT WITH AN ELECTRODE AND A SOURCE OF DIRECT CURRENT, THE ARTICLE TO BE CLEANED BEING CONNECTED AS A CATHODE AND THE ELECTRODE BEING CONNECTED AS AN ANODE (2) ESTABLISHING AN ARC BETWEEN THE ELECTRODE AND SURFACE-CONTAMINATED METAL ARTICLE AND (3) MOVING THE ARC OVER THE SURFACE OF THE METAL ARTICLE WHILE CONTINUOUSLY MOVING SAID METAL ARTICLE
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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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |