US4134925A
Expired / Lapsed
US
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Ar-octahalogendiphenylether-4,4-dimethanols
Assignee: Dynamit Nobel AG
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Filing: 1976-07-27
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Granted: 1979-01-16
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Expires: 1996-07-27
Abstract
Abstract Compounds of the formula: ##STR1## The compounds can be produced by reacting the corresponding 4,4'-bis-(halogenmethyl)-ar-octahalogendiphenylethers with at least 2 moles of alkali acetate or formiate in the presence of alcohol as transesterification agent and solvent. The compounds are useful as intermediates for the production of insecticides, herbicides or hydrophobizing agents.
Inventors
- 👤 Egon N. Petersen
- 👤 Klaus Schrage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:27
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/257; C07C43/295
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
23 words
ar-Octahalogendiphenylether-4,4'-dimethanol of the formula: ##STR8## wherein the n represents a number of from 0 to 8 and the k represents 8 - n.
Claim 2
Dependent Claim
23 words
ar-Octahalogendiphenylether-4,4'-dimethanol of the formula: ##STR8## wherein the n represents a number of from 0 to 8 and the k represents 8 - n.
Claim 3
Dependent Claim
7 words
Compound of claim 1, which is ar-Octabromodiphenylether-4,4'-dimethanol.
Claim 4
Dependent Claim
23 words
Compound of claim 1, having the gross formula elemental analysis: C 14 H 6 Br 7 .1 Cl 0 .9 O 3 .
Claim 5
Dependent Claim
7 words
Compound of claim 1, which is ar-octachlorodiphenylether-4,4'-dimethanol.
Claim 6
Dependent Claim
10 words
Compound of claim 1, wherein n is at least 6.
Claim 7
Dependent Claim
10 words
Compound of claim 1, wherein n is at least 7.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |