US3684588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal treating process
Assignee: Henkel Corp
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Filing: 1970-05-20
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Granted: 1972-08-15
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Expires: 1990-05-20
Abstract
Abstract THERE IS DISCLOSED A METHOD FOR APPLYING PROTECTIVE CHEMICAL COATINGS TO METAL SURFACES TO IMPROVE THEIR PAINT ADHESION PROPERTIES AND/OR CORROSION RESISTANCE BY SEQUENTIALLY SPRAYING ONTO SAID SURFACES, THROUGH A NOZZLE SYSTEM ON A SINGLE HAND WAND, A CLEANING SOLUTION AT HIGH PRESSURE SUCH AS 300-600 P.S.I., A CHEMICAL COATING SOLUTION AT A LOW PRESSURE SUCH AS 80 P.S.I., AND A FINAL PASSIVATING RINSE. WATER RINSES MAY ALSO BE APPLIED THROUGH THE SAME HAND WAND MOUNTED NOZZLE SYSTEM. THE METHOD IS CAPABLE OF APPLYING ZINC PHOSPHATE COATINGS TO FERRIFEROUS AND ZINCIFEROUS SURFACES, AS WELL AS OTHER TYPES OF CHEMICAL COATINGS TO A WIDE VARIETY OF METAL SURFACES.
Inventors
- 👤 John Patrick Curran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:33
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/73; C23C22/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |