US3090709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate coating of metals
Assignee: MAN-GILL CHEMICAL COMPANY AN OH CORP
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Filing: 1953-08-10
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Granted: 1963-05-21
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Expires: 1973-08-10
Abstract
No abstract record available.
Inventors
- 👤 John A Henricks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:41
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/12; C23C22/13; C23C22/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
A SOLUTION FOR FORMING A PROTECTIVE COATING ON METALLIC SURFACES WHICH COMPRISES AN AQUEOUS ACIDIC SOLUTION CONSISTING ESSENTIALLY OF ABOUT 0.10.4% ZINC ION, AT LEAST 0.132 CALCIUM ION, THE WEIGHT RATIO OF THE CALCIUM ION TO THE ZINC ION BEING IN THE RANGE OF 0.25-4.5, THE PHOSPHATE ION AD THE NITRATE ION, THE WEIGHT RATIO OF NITRATE ION TO PHOSPHATE ION BEING IN THE RANGE OF 0.5-4.35.
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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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |