Patent US2721156A successfully refreshed from Google Patents.
US2721156A
Expired / Lapsed
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Method of treating aluminum-coated iron electrodes
Assignee: Hartford National Bank and Trust Co
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Filing: 1954-05-14
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Granted: 1955-10-18
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Expires: 1974-05-14
Abstract
No abstract record available.
Inventors
- 👤 Steuck Willi Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:55
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/30; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019; H01J2893/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A METHOD OF MANUFACTURING AN ELECTRODE FOR AN ELECTRIC DISCHARGE TUBE COMPRISING PROVIDING AN ELECTRODE CONSTITUTED OF SHEET IRON COATED WITH ALUMINUM, SUBJECTING SAID ELECTRODE TO AN ANNEALING PROCESS AT ABOUT 500* TO 1000* C., AND THEREAFTER BOILING SAID ELECTRODE IN DISTILLED WATER FOR A SHORT TIME.
Claim 2
Independent Claim
47 words
A METHOD OF MANUFACTURING AN ELECTRODE FOR AN ELECTRIC DISCHARGE TUBE COMPRISING PROVIDING AN ELECTRODE CONSTITUTED OF SHEET IRON COATED WITH ALUMINUM, SUBJECTING SAID ELECTRODE TO AN ANNEALING PROCESS AT ABOUT 500* TO 1000* C., AND THEREAFTER BOILING SAID ELECTRODE IN DISTILLED WATER FOR A SHORT TIME.
References Cited (Backward Citations)
US2109387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |