US3026255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting metal surfaces
Assignee: Pechiney SA
•
Filing: 1958-04-09
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Granted: 1962-03-20
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Expires: 1978-04-09
Abstract
No abstract record available.
Inventors
- 👤 Riou Marcel
- 👤 Richaud Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:29
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/36; C25D11/02; C25D11/04; C25D11/18; C25D11/24; C25D11/246
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
IN A METHOD OF PROTECTING A METAL SURFACE, THE COMBINAION OF THE SUCCESIVE TREATING STEPS OF (A) CLEANING AND DEGREASING THE METALLIC SURFACE, (B) ANODICALLY OXIDIZING SAID METALLIC SURFACE, (C) IMMERSING THE RESULTANT ANODICALLY OXIDIZED SURFACE IN A BOILING AQUEOUS SOLUTION HAVING A PH BETWEEN 4 AND 9 AND CONTAINING THE SODIUM POLYMERIZATE SALT OF A POLYSTYRENE SULFONIC ACID IN A CONCONTRATION OF 10 GRAMS PER LITER, (D) WITHDRAWING THE METALLIC SURFACE FROM SAID SOLUTION, (E) RINSING THE SAME WITH WATER TO REMOVE THE EXCESS OF LIQUID UNADSORBED BY SAID METALLIC SURFACE, AND (F) DRYING THE RESULTANT SEALED SURFACE.
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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) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |