US3222226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and solution for improving conversion coated metallic surfaces
Assignee: Occidental Chemical Corp
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Filing: 1962-10-15
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Granted: 1965-12-07
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Expires: 1982-10-15
Abstract
No abstract record available.
Inventors
- 👤 James I Maurer
- 👤 Richard E Palmer
- 👤 Vinod D Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:11
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/82; C23C22/83; C23C2222/00; C23C2222/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD OF PREPARING INTEGRAL CHEMICAL COATINGS ON A METAL SURFACE SELECTED FROM THE GROUP CONSISTING OF PHOSPHATE, PHOSPHATE-OXIDE, CHROMATE, OXALATE AND ARSENATE COATING TO RECEIVE AN ORGANIC FINISH WHICH COMPRISES THE STEPS OF APPLYING TO SAID CHEMICAL COATING A DILUTE AQUEOUS SOLUTION CONTAINING AT LEAST ABOUT 0.001% TRIVALENT CHROMIUM IN THE FORM OF A CHROMIUM COMPLEX, SAID COMPLEX CONTAINING AN ANION CAPABLE OF BEING DISPLACED BY THE ANION PORTION OF SAID CH EMICAL COATING UPON CONTACT BY THE SAID SOLUTION WITH SAID COATING, SAID SOLUTION HAVING A PH IN THE RANGE OF ABOUT 3.8 TO ABOUT 6, AND THEREAFTER WATER RINSING SAID SURFACE.
Claim 2
Independent Claim
104 words
A METHOD OF PREPARING INTEGRAL CHEMICAL COATINGS ON A METAL SURFACE SELECTED FROM THE GROUP CONSISTING OF PHOSPHATE, PHOSPHATE-OXIDE, CHROMATE, OXALATE AND ARSENATE COATING TO RECEIVE AN ORGANIC FINISH WHICH COMPRISES THE STEPS OF APPLYING TO SAID CHEMICAL COATING A DILUTE AQUEOUS SOLUTION CONTAINING AT LEAST ABOUT 0.001% TRIVALENT CHROMIUM IN THE FORM OF A CHROMIUM COMPLEX, SAID COMPLEX CONTAINING AN ANION CAPABLE OF BEING DISPLACED BY THE ANION PORTION OF SAID CH EMICAL COATING UPON CONTACT BY THE SAID SOLUTION WITH SAID COATING, SAID SOLUTION HAVING A PH IN THE RANGE OF ABOUT 3.8 TO ABOUT 6, AND THEREAFTER WATER RINSING SAID SURFACE.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |