Patent US3093493A successfully refreshed from Google Patents.
US3093493A
Expired / Lapsed
US
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Coating material for corrosion prevention
Assignee: PQ Corp
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Filing: 1960-11-23
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Granted: 1963-06-11
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Expires: 1980-11-23
Abstract
No abstract record available.
Inventors
- 👤 Freyhold Helmut Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:32
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C04B2111/00; C04B2111/00474; C04B2111/00482
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A CORROSION-RESISTANT COATING COMPOSITION, COMPOSED OF FINELY-DIVIDED METALLIC ZINC, ALKALI SILICATE AND MINOR QUANTITIES OF ADDITIVES, SAID ADDITIVES CONSISTING ESSENTIALLY OF ALKALI CHROMATES AND ON ORGANIC COMPOUND CONTAINING AT LEAST TWO AMINO GROUPS IN ITS MOLECULE SELECTED FROM THE GROUP CONSISTING OF HEXAMETHYLENETETRAMINE, PHENYLENEDIAMINE, BENZIDINE, GUANIDINE AND MELAMINE, EACH OF SAID ADDITIVES BEING PERSENT IN AN AMOUNT BETWEEN ABOUT 0.1 TO 2.0 PERCENT BY WEIGHT, BASED ON THE ALKALI SILICATE.
Claim 2
Dependent Claim
70 words
A CORROSION-RESISTANT COATING COMPOSITION, COMPOSED OF FINELY-DIVIDED METALLIC ZINC, ALKALI SILICATE AND MINOR QUANTITIES OF ADDITIVES, SAID ADDITIVES CONSISTING ESSENTIALLY OF ALKALI CHROMATES AND ON ORGANIC COMPOUND CONTAINING AT LEAST TWO AMINO GROUPS IN ITS MOLECULE SELECTED FROM THE GROUP CONSISTING OF HEXAMETHYLENETETRAMINE, PHENYLENEDIAMINE, BENZIDINE, GUANIDINE AND MELAMINE, EACH OF SAID ADDITIVES BEING PERSENT IN AN AMOUNT BETWEEN ABOUT 0.1 TO 2.0 PERCENT BY WEIGHT, BASED ON THE ALKALI SILICATE.
References Cited (Backward Citations)
US2944919A
Cited
US2968571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |