US3629339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of phenols
Assignee: Hooker Chemical Corp
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Filing: 1969-03-28
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Granted: 1971-12-21
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Expires: 1989-03-28
Abstract
Abstract AN INORGANIC TRIVALENT ARSENIC COMPOUND, PRESENT IN A STABILIZING PROPORTION, CAN BE USED TO STABILIZE PHENOL, UNSUBSTITUTED POLYHYDRIC MONOCYCLIC PHENOLS, UNSUBSTITUTED FUSED RING PHENOLS, UNSUBSTITUTED ALKYLIDENE LINKED BISPHENOLS, THEIR LOWER ALKYL DERIVATIVES, AND THEIR HALOGENATED DERIVATIVES, AGAINST DETERIORATION IN COLOR AND ODOR WITH AGE, PROVIDED IT IS SUBSTANTIALLY SOLUBLE, DOES NOT DISCOLOR THE PHENOL AND MUST NOT CREATE A VISIBLY TURBID APPEARANCE IN THE CONCENTRATIONS USED. IT CAN BE USED IN COMBINATION WITH OTHER STABILIZERS.
Inventors
- 👤 Hans L Schlichting
- 👤 Ellis I Lichtblau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:49
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C07; C07C; C07C37/00; C07C37/68; C07C37/88
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |