US2927068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting corrosion
Assignee: Pure Oil Co
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Filing: 1957-12-23
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Granted: 1960-03-01
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Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Marsh
- 👤 Schaschl Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:22
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/06; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/23; C23C22/24; C23C22/33; C23C22/73; C23F13/04; C23F2213/00; C23F2213/30; C23F2213/31; C23F2213/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN A PROCESS FOR CATHODICALLY PROTECTING FERROUS METAL STRUCTURES, SUBMERGED IN WATER OR BURIED BENEATH THE GROUND, AGAINST CORROSION, THE STEPS OF COATING THE BARE METAL STRUCTURE WITH A SOLUTION OF ALKALI METAL HEXAMETAPHOSPHATE, DRYING THE COATING THEN COATING THE STRUCTURE WITH A SECOND SOLUTIOIN CONTAINING A PHOSPHORIC ACID AND AN ALKALI METAL SALT OF THE GROUP CONSISTING OF ALKALI METAL CHROMATES AND DICHROMATES, DRYING THE COATING BEFORE SUBMERGING OR BURYING THE STRUCTURE, CONTACTING SAID COATING WITH THE WATER OR GROUND, AND CATHODICALLY PROTECTING THE STRUCTURE BY APPLYING THERETO A CURRENT HAVING A DENSITY EQUAL TO A SMALL FRACTION OF THAT REQUIRED TO PROTECT THE UNCOATED STRUCTURE AGAINST CORROSION.
Claim 2
Dependent Claim
109 words
IN A PROCESS FOR CATHODICALLY PROTECTING FERROUS METAL STRUCTURES, SUBMERGED IN WATER OR BURIED BENEATH THE GROUND, AGAINST CORROSION, THE STEPS OF COATING THE BARE METAL STRUCTURE WITH A SOLUTION OF ALKALI METAL HEXAMETAPHOSPHATE, DRYING THE COATING THEN COATING THE STRUCTURE WITH A SECOND SOLUTIOIN CONTAINING A PHOSPHORIC ACID AND AN ALKALI METAL SALT OF THE GROUP CONSISTING OF ALKALI METAL CHROMATES AND DICHROMATES, DRYING THE COATING BEFORE SUBMERGING OR BURYING THE STRUCTURE, CONTACTING SAID COATING WITH THE WATER OR GROUND, AND CATHODICALLY PROTECTING THE STRUCTURE BY APPLYING THERETO A CURRENT HAVING A DENSITY EQUAL TO A SMALL FRACTION OF THAT REQUIRED TO PROTECT THE UNCOATED STRUCTURE AGAINST CORROSION.
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) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |