Patent US3728281A successfully refreshed from Google Patents.
US3728281A
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Corrosion inhibiting composition containing hydrazine and a pyrazolidone or an aminophenol
Assignee: Bayer CropScience Ltd
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Filing: 1971-03-31
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Granted: 1973-04-17
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Expires: 1991-03-31
Abstract
Abstract AN AQUEOUS COMPOSITION FOR INHIBITING CORROSION IN SYSTEMS CONTAINING HOT WATER COMPRISES HYDRAZINE AND AT LEAST ONE ACTIVATING COMPOUND WHICH MAY BE A PYRAZOLIDONE OR AN AMINOPHENOL.
Inventors
- 👤 C Marks
- 👤 J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:04
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/12; E01B27/13; E01B27/16; E01B27/18; C; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 0
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |