Patent US3279958A successfully refreshed from Google Patents.
US3279958A
Expired / Lapsed
US
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Method of rinsing conversion coatings with chromium complex solutions from chromic acid
Assignee: Occidental Chemical Corp
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Filing: 1962-10-15
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Granted: 1966-10-18
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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
2026-11-04 16:47
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/82; C23C22/83; C23C2222/00; C23C2222/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD OF PREPARING INTEGRAL CHEMICAL COATINGS, SELECTED FROM THE GROUP CONSISTING OF PHOSPHATE COATINGS, PHOSPHATE-OXIDE COATINGS, CHROMATE COATINGS, OXALATE COATINGS AND ARSENATE COATINGS, ON A METAL SURFACE 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 CHROMATE COMPLEX, SAID SOLUTION HAVING A PH IN THE RAGE OF AOUT 3.8 TO ABOUT 6, AND THEREAFTER WATER RINSING SAID SURFACE.
Claim 2
Independent Claim
82 words
A METHOD OF PREPARING INTEGRAL CHEMICAL COATINGS, SELECTED FROM THE GROUP CONSISTING OF PHOSPHATE COATINGS, PHOSPHATE-OXIDE COATINGS, CHROMATE COATINGS, OXALATE COATINGS AND ARSENATE COATINGS, ON A METAL SURFACE 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 CHROMATE COMPLEX, SAID SOLUTION HAVING A PH IN THE RAGE OF AOUT 3.8 TO ABOUT 6, AND THEREAFTER WATER RINSING SAID 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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |