US3330744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodic treatment of zinc and zinc-base alloys and product thereof
Assignee: International Lead Zinc Research Organization Inc
•
Filing: 1963-12-12
•
Granted: 1967-07-11
•
Expires: 1983-12-12
Abstract
No abstract record available.
Inventors
- 👤 Wright Maurice Morgan
- 👤 Guttman Hyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:17
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/36; C25D11/02; C25D11/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
AN ANODIC PROCESS FOR COATING ZINC AND ZINC-BASE ALLOY SURFACES WHICH COMPRISES THE STEP OF SUBJECTING TO ELECTROLYSIS USING ALTERNATING CURRENT AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF PHOSPHATE ANIONS IN AMOUNT WITHIN THE RANGE OF FROM ABOUT 0.3 TO ABOUT 3 MOLES PER LITER CALCULATED AS PO4, AT LEAST ONE ANOIN SELECTED FORM THE GROUP CONSISITNG OF CHROMATE, MOYBDATE, TUNGSTATE AND VANADATE CALCULATED AS CRO4, MOO4, WO4 AND VO3 IN A TOTAL AMOUNT WITHIN THE RANGE OF FROM ABOUT 0.1 TO ABOUT 3 MOLES PERLITER, FLUORIDE ANIONS IN AMOUNT WITHIN THE RANGE OF FROM ZERO TO ABOUT 1 MOLE PER LITER CALCULATED AS F, AND CATIONS OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM, THE SAID BATH HAVING A PH VALUE OF 5 TO 11.4, USING IN SAID ELECTROLYSIS AT LEAST ONE ELECTRODE HAVING EXPOSED SURFACES FORMED AT A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND ZINC-BASE ALLOYS, AND CONTINUING SAID ELECTROLYSIS FOR A TIME SUFFICIENT TO FORM A COATING ON SAID ELECTRODE.
Claim 2
Dependent Claim
33 words
AN ARTICLE OF MANUFACTURE HAVING SURFACES FORMED OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND ZINC-BASE ALLOYS AND COATED WITH A FILM PRODUCED BY THE PROCESS ACCORDING TO CLAIM 3.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |