Patent US3108939A successfully refreshed from Google Patents.
US3108939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platinum plug-valve metal anode for cathodic protection
Assignee: Individual
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Filing: 1958-02-14
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Granted: 1963-10-29
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Expires: 1978-02-14
Abstract
No abstract record available.
Inventors
- 👤 Rolland C Sabins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:59
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/06; C23F13/08; C23F13/16; C23F2213/00; C23F2213/20; C23F2213/21; C23F2213/30; C23F2213/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A CONTROL SYSTEM FOR PREVENTING CORROSION OF A METALLIC STRUCTURE WHICH IS SUBJECTED TO SEA WATER ENVIRONMENT COMPRISING IN COMBINATION A SOURCE OF DIRECT CURRENT HAVING THE NEGATIVE SIDE THEREOF CONNECTED WITH THE STRUCTURE; AN ANODE CONNECTED TO THE POSITIVE SIDE OF SAID SOURCE OF CURRENT AND SUBJECTED TO THE SEA WATER ENVIRONMENT, SAID ANODE CONSISTING OF HOMOGENEOUS METAL WHICH IN ITS ENTIRETY IS SUSCEPTIBLE OF BECOMING PASSIVE TO CURRENT FLOW WHEN SO COUPLED WITH THE POSITIVE SIDE OF THE SOURCE OF CURRENT AND WITH THE STRUCTURE THROUGH THE SEA WATER ENVIRONMENT, AND AFTER A CERTAIN STAGE OF IONIZATION IS ATTAINED, SAID ANODE ALSO CONSISTING OF MEANS FOR MAINTAINING ANODICAL ACTIVENESS OF THE ENTIRE SURFACE OF SAID METAL WITH IS EXPOSED TO THE SEA WATER ENVIRONMENT, SAID CONSISTING OF AT LEAST ONE PLUG OF METAL WHICH WILL NOT DISSOLVE IN THE COMMONLY USED ACIDS AND WHICH IS IN INTIMATE CONTACT WITH THE FIRST MENTIONED METAL OF THE ANODE AND WHICH HAS A SURFACE EXPOSEOD TO THE SEA WATER ENVIRONMENT.
Claim 2
Dependent Claim
169 words
A CONTROL SYSTEM FOR PREVENTING CORROSION OF A METALLIC STRUCTURE WHICH IS SUBJECTED TO SEA WATER ENVIRONMENT COMPRISING IN COMBINATION A SOURCE OF DIRECT CURRENT HAVING THE NEGATIVE SIDE THEREOF CONNECTED WITH THE STRUCTURE; AN ANODE CONNECTED TO THE POSITIVE SIDE OF SAID SOURCE OF CURRENT AND SUBJECTED TO THE SEA WATER ENVIRONMENT, SAID ANODE CONSISTING OF HOMOGENEOUS METAL WHICH IN ITS ENTIRETY IS SUSCEPTIBLE OF BECOMING PASSIVE TO CURRENT FLOW WHEN SO COUPLED WITH THE POSITIVE SIDE OF THE SOURCE OF CURRENT AND WITH THE STRUCTURE THROUGH THE SEA WATER ENVIRONMENT, AND AFTER A CERTAIN STAGE OF IONIZATION IS ATTAINED, SAID ANODE ALSO CONSISTING OF MEANS FOR MAINTAINING ANODICAL ACTIVENESS OF THE ENTIRE SURFACE OF SAID METAL WITH IS EXPOSED TO THE SEA WATER ENVIRONMENT, SAID CONSISTING OF AT LEAST ONE PLUG OF METAL WHICH WILL NOT DISSOLVE IN THE COMMONLY USED ACIDS AND WHICH IS IN INTIMATE CONTACT WITH THE FIRST MENTIONED METAL OF THE ANODE AND WHICH HAS A SURFACE EXPOSEOD TO THE SEA WATER ENVIRONMENT.
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) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |