US3785988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion and scale inhibiting composition
Assignee: Kokusai Kasei Kosha Co Ltd
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Filing: 1971-07-02
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Granted: 1974-01-15
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Expires: 1991-07-02
Abstract
Abstract AN INHIBITOR FOR PREVENTING FORMATION OF CORROSION AND SCALE ON METALS IN THE PRESENCE OF WATER IS FORMED OF ABOUT 40% BY WEIGHT HYDRAZINE, ABOUT 25% MAGANESE COMPOUND, ABOUT 15% ZINC OR ZINC COMPOUND, ABOUT 15% SILICON CHLORINE HYDROGEN COMPOUND, ABOUT 4% MINERAL OIL, ABOUT 1% SILVER COMPOUND, AND ABOUT 0.4% BERYLLIUM COMPOUND.
Inventors
- 👤 Y Yamashita
- 👤 M Sata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:48
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/187; C02; C02F; C02F5/00; C02F5/08; C23F14/00; C23F14/02
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |