US3278404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cathodic protection
Assignee: Imperial Chemical Industries Ltd
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Filing: 1958-07-16
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Granted: 1966-10-11
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Expires: 1978-07-16
Abstract
No abstract record available.
Inventors
- 👤 Cotton Joseph Bernard
- 👤 Barber Arthur Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:44
CPC Classifications
D; D06; D06M; D06M23/00; C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/055; C25B11/057; C25B11/061; C25B11/063; C25B11/073; C25B11/075; C25B11/081; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10S428/9335; Y10S428/934; Y10S428/935; Y10S428/936; Y10S428/937; Y10S428/938; Y10S428/939; Y10S428/94; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12861; Y10T428/12875
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR CATHODICALLY PROTECTING A METAL STRUCTURE IN CONTACT WITH CORROSIVE AQUEOUS MEDIA WHICH COMPRISES PASSING CURRENT THROUGH AN ELECTRICAL SYSTEM WHICH INCLUDES A CURRENT SOURCE HAVING A NEGATIVE TERMINAL CONNECTED TO SAID STRUCTURE AND A POSITIVE TERMINAL CONNECTED TO AN ANODE POSITIONED IN SAID MEDIA AND INSULATED FROM SAID NEGATIVE TERMINAL, SAID ANODE COMPRISING A SUPPORT SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND TITANIUM BASE ALLOYS HAVING ANODIC POLARIZATION PROPERTIES ESSENTIALLY THE SAME AS THOSE OF TITANIUM IN SAID MEDIA, SAID SUPPORT HAVING AN OPERATIVE SURFACE CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF PLATINUM, RHODIUM AND PLATINUM AND RHODIUM BASE ALLOYS IN WHICH ALL OF THE CONSTITUENTS ARE PLATINUM GROUP METALS.
Claim 2
Dependent Claim
119 words
A PROCESS FOR CATHODICALLY PROTECTING A METAL STRUCTURE IN CONTACT WITH CORROSIVE AQUEOUS MEDIA WHICH COMPRISES PASSING CURRENT THROUGH AN ELECTRICAL SYSTEM WHICH INCLUDES A CURRENT SOURCE HAVING A NEGATIVE TERMINAL CONNECTED TO SAID STRUCTURE AND A POSITIVE TERMINAL CONNECTED TO AN ANODE POSITIONED IN SAID MEDIA AND INSULATED FROM SAID NEGATIVE TERMINAL, SAID ANODE COMPRISING A SUPPORT SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND TITANIUM BASE ALLOYS HAVING ANODIC POLARIZATION PROPERTIES ESSENTIALLY THE SAME AS THOSE OF TITANIUM IN SAID MEDIA, SAID SUPPORT HAVING AN OPERATIVE SURFACE CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF PLATINUM, RHODIUM AND PLATINUM AND RHODIUM BASE ALLOYS IN WHICH ALL OF THE CONSTITUENTS ARE PLATINUM GROUP METALS.
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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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |