Patent US3655764A successfully refreshed from Google Patents.
US3655764A
Expired / Lapsed
US
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Continuous process for making hydroxylamines
Assignee: Polaroid Corp
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Filing: 1969-02-24
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Granted: 1972-04-11
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Expires: 1989-02-24
Abstract
Abstract N,N-DISUBSTITUED HYDROXYLAMINES ARE PREPARED IN IMPROVED YIELDS BY CONTINUOUSLY AND PROGRESSIVELY REACTING THE CORRESPONDING SECONDARY AMINE WITH AN INORGANIC PEROXIDE AT ELEVATED TEMPERATURES AND CONTINUOUSLY QUENCYING THE REACTION AS THE PEROXIDE BECOMES CONSUMED BY RAPIDLY COOLING THE REACTION MIXTURE TO BELOW ABOUT 25*C.
Inventors
- 👤 Henry Bader
- 👤 Alexander Boag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:11
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3014
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |