US2851385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for coating aluminum surfaces
Assignee: Henkel Corp
•
Filing: 1952-04-03
•
Granted: 1958-09-09
•
Expires: 1972-04-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Palin Spruance
- 👤 Jr Nelson James Newhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:08
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37; C23C22/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN THE ART OF PRODUCING A CHROMATE CONVERSION COATING ON SURFACES OF ALUMINUM AND ALLOYS THEREOF IN WHICH ALIUMINUM IS THE PREDOMINANT INGREDIENT BY TREATING THE SURFACE WITH AN AQUEOUS ACID BATH OF THE TYPE WHICH CONSISTS ESSENTIALLY OF HEXAVALENT CHROMIUM AND FLUORINE IN PROPORTIONS CAPABLE OF PRODUCING SUCH A COATING; THE METHOD WHICH COMPRISES INCLUDING IN THE BATH, AS AN ADDITION AGENT, METAL IONS FROM THE GROUP CONSISTING OF ZIRCONIUM, TITANIUM AND STANNIC TIN IN A QUANTITY SUFFICIENT TO ENHANCE THE CORROSION RESISTANCE OF THE COATED SURFACE AND THEN TREATING THE SURFACE WITH SUCH BATH.
Claim 2
Dependent Claim
96 words
IN THE ART OF PRODUCING A CHROMATE CONVERSION COATING ON SURFACES OF ALUMINUM AND ALLOYS THEREOF IN WHICH ALIUMINUM IS THE PREDOMINANT INGREDIENT BY TREATING THE SURFACE WITH AN AQUEOUS ACID BATH OF THE TYPE WHICH CONSISTS ESSENTIALLY OF HEXAVALENT CHROMIUM AND FLUORINE IN PROPORTIONS CAPABLE OF PRODUCING SUCH A COATING; THE METHOD WHICH COMPRISES INCLUDING IN THE BATH, AS AN ADDITION AGENT, METAL IONS FROM THE GROUP CONSISTING OF ZIRCONIUM, TITANIUM AND STANNIC TIN IN A QUANTITY SUFFICIENT TO ENHANCE THE CORROSION RESISTANCE OF THE COATED SURFACE AND THEN TREATING THE SURFACE WITH SUCH BATH.
References Cited (Backward Citations)
DE546466C
Cited
US1957354A
Cited
US1939421A
Cited
US2276353A
Cited
US2348698A
Cited
US2312855A
Cited
US2357219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |