US3341444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodization control circuits
Assignee: AT&T Inc
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Filing: 1964-09-01
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Granted: 1967-09-12
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Expires: 1984-09-01
Abstract
No abstract record available.
Inventors
- 👤 Chapelle Edward A La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:03
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/26; C; C25; C25D; C25D21/00; C25D21/12; H01C17/262
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A CIRCUIT FOR ANODIZING A METAL OBJECT IN AN ELECTROLYTIC ANODIZING CELL TO INCREASE THE RESISTANCE OF SAID OBJECT TO A DESIRED VALUE, WHICH COMPRISES: MEANS FOR SUPPLYING ANODIZING CURRENT TO THE CELL TO ANODIZE THE OBJECT AND THEREBY INCREASE ITS RESISTANCE; MEANS FOR TESTING THE RESISTANCE OF THE OBJECT; MEANS CYCLICALLY RENDERED EFFECTIVE FOR ALTERNATELY AND AUTOMATICALLY SWITICHING THE CURRENT SUPPLYING MEANS ACROSS THE CELL AND THEN ACROSS THE RESISTANCE TESTING MEANS INTO TESTING RELATIONSHIP WITH THE OBJECT TO ALTERNATELY ANODIZE THE OBJECT AND TEST THE RESISTANCE THEREOF; AND MEANS, RESPONSIVE TO THE RESISTANCE TESTING MEANS, FOR INDICATING WHEN THE OBJECTS HAS REACHED THE DESIRED RESISTANCE VALUE.
Claim 2
Dependent Claim
108 words
A CIRCUIT FOR ANODIZING A METAL OBJECT IN AN ELECTROLYTIC ANODIZING CELL TO INCREASE THE RESISTANCE OF SAID OBJECT TO A DESIRED VALUE, WHICH COMPRISES: MEANS FOR SUPPLYING ANODIZING CURRENT TO THE CELL TO ANODIZE THE OBJECT AND THEREBY INCREASE ITS RESISTANCE; MEANS FOR TESTING THE RESISTANCE OF THE OBJECT; MEANS CYCLICALLY RENDERED EFFECTIVE FOR ALTERNATELY AND AUTOMATICALLY SWITICHING THE CURRENT SUPPLYING MEANS ACROSS THE CELL AND THEN ACROSS THE RESISTANCE TESTING MEANS INTO TESTING RELATIONSHIP WITH THE OBJECT TO ALTERNATELY ANODIZE THE OBJECT AND TEST THE RESISTANCE THEREOF; AND MEANS, RESPONSIVE TO THE RESISTANCE TESTING MEANS, FOR INDICATING WHEN THE OBJECTS HAS REACHED THE DESIRED RESISTANCE VALUE.
References Cited (Backward Citations)
US3148129A
Cited
US3254014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |