Patent US3220890A successfully refreshed from Google Patents.
US3220890A
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Process and composition for phosphatizing metals
Assignee: Hooker Chemical Corp
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Filing: 1962-01-10
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Granted: 1965-11-30
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Expires: 1982-01-10
Abstract
No abstract record available.
Inventors
- 👤 William J Vullo
- 👤 Donald H Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:14
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02854; C23G5/02893; C07; C07C; C07C17/00; C07C17/38; C07C17/42; C23C; C23C22/00; C23C22/02; C23C22/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A STABILIZED PHOSPHATIZING COMPOSITION COMPRISING A CHLORINATED LOWER ALPHATIC HYDROCARBON, A COSOLVENT CAPTABLE OF DISSOLVING PHOSPHORIC ACID IN SAID HYDROCARBON, PHOSPHORIC ACID, AND A DIHYDROXYAROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIHYDROXYBENZENE AND DIHYDROXYNAPHTHALENE COMPOUNDS.
Claim 2
Dependent Claim
36 words
A STABILIZED PHOSPHATIZING COMPOSITION COMPRISING A CHLORINATED LOWER ALPHATIC HYDROCARBON, A COSOLVENT CAPTABLE OF DISSOLVING PHOSPHORIC ACID IN SAID HYDROCARBON, PHOSPHORIC ACID, AND A DIHYDROXYAROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIHYDROXYBENZENE AND DIHYDROXYNAPHTHALENE COMPOUNDS.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |