Patent US2687993A successfully refreshed from Google Patents.
US2687993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrocoating
Assignee: Individual
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Filing: 1950-05-31
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Granted: 1954-08-31
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Expires: 1970-05-31
Abstract
No abstract record available.
Inventors
- 👤 Cox George Chandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:21
CPC Classifications
C; C25; C25D; C25D9/00; C25D9/04; C25D9/08; C25D9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
THE PROCESS OF FORMING A FIRMLY BONDED ELECROCOATING ON THE SURFACE OF A FERROUS METAL STRUCTURE WHICH IS IN CONTACT WITH AN ENCLOSED BODY OF AN ELECTROLYTE ESSENTIALLY COMPOSED OF SEA WATER AND WHICH COMPRISES THE STEPS OF ADDING A SUFFICIENT QUANTITY OF AT LEAST ONE OF THE MINERAL ACIDS TO GIVE A HYDROGEN ION CONCENTRATION BWTWEEN 2.8 AND 4.1 ON THE PH SCALE AND OF ADDING A SUFFICIENT QUANTITY OF AT LEAST ONE OF THE IRON SALTS OF A MINERAL ACID TO GIVE AN EQUIVALENT SOLUBLE IRON CONTENT GREATER THAN 0.02% AND LESS THAN 0.4%, THEN MAKING THE SURFACE CATHODIC AT A SUFFICIENT CURRENT DENSITY TO DEPOSIT THEREON A FIRMLY ADHERENT COATING WHICH CONSISTS SUBSTANTIALLY OF A MIXTURE OF WATER-IN SOLUBLE COMPOUNDS OF IRON, MAGNESIUM, AND CALCIUM.
Claim 2
Dependent Claim
128 words
THE PROCESS OF FORMING A FIRMLY BONDED ELECROCOATING ON THE SURFACE OF A FERROUS METAL STRUCTURE WHICH IS IN CONTACT WITH AN ENCLOSED BODY OF AN ELECTROLYTE ESSENTIALLY COMPOSED OF SEA WATER AND WHICH COMPRISES THE STEPS OF ADDING A SUFFICIENT QUANTITY OF AT LEAST ONE OF THE MINERAL ACIDS TO GIVE A HYDROGEN ION CONCENTRATION BWTWEEN 2.8 AND 4.1 ON THE PH SCALE AND OF ADDING A SUFFICIENT QUANTITY OF AT LEAST ONE OF THE IRON SALTS OF A MINERAL ACID TO GIVE AN EQUIVALENT SOLUBLE IRON CONTENT GREATER THAN 0.02% AND LESS THAN 0.4%, THEN MAKING THE SURFACE CATHODIC AT A SUFFICIENT CURRENT DENSITY TO DEPOSIT THEREON A FIRMLY ADHERENT COATING WHICH CONSISTS SUBSTANTIALLY OF A MIXTURE OF WATER-IN SOLUBLE COMPOUNDS OF IRON, MAGNESIUM, AND CALCIUM.
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) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |