US4133821A
Expired / Lapsed
US
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Alkylidenediquinocyclopropanes and Diarylcyclopropenes and method for preparation
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1977-03-15
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Granted: 1979-01-09
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Expires: 1997-03-15
Abstract
Abstract Alkylidenediquinocyclopropanes and diarylcyclopropenes and the preparation of the former by oxidation of the latter and which are characterized by low energy electronic absorption, pronounced dichroism and characteristic specular reflectance.
Inventors
- 👤 Robert C. West
- 👤 Douglas E. Beyer
- 👤 Koichi Komatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:49
CPC Classifications
C; C07; C07C; C07C50/00; C07C50/38; C07C37/00; C07C37/01; C07C37/055; C07C37/11; C07C37/20; C07C39/00; C07C39/24; C07C39/42; C07C46/00; C07C46/02; C07C46/06; C07C50/24; C07C2601/00; C07C2601/02; C07C2601/06; C07C2601/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
An alkylidenediquinocyclopropane having the general formula ##STR12## in which X and Y, when identifying separate groups, are selected from the group consisting of (a) NC (b) COOR ##STR13## and, when identifying a single group, is selected from the group consisting of ##STR14## in which Z is a halogen group and in which R is a group selected from the group consisting of hydrogen, C 1 -C 18 alkyl, cycloalkyl aryl and alkaryl.
Claim 2
Dependent Claim
72 words
An alkylidenediquinocyclopropane having the general formula ##STR12## in which X and Y, when identifying separate groups, are selected from the group consisting of (a) NC (b) COOR ##STR13## and, when identifying a single group, is selected from the group consisting of ##STR14## in which Z is a halogen group and in which R is a group selected from the group consisting of hydrogen, C 1 -C 18 alkyl, cycloalkyl aryl and alkaryl.
Claim 3
Dependent Claim
15 words
An alkylidenediquinocyclopropane as claimed in claim 1 in which X and Y are both NC.
Claim 4
Dependent Claim
20 words
An alkylidenediquinocyclopropane as claimed in claim 1 in which X is NC and Y is COOC 2 H 5 .
Claim 5
Dependent Claim
17 words
An alkylidenediquinocyclopropane as claimed in claim 1 in which X and Y is a single group ##STR15##
Claim 6
Dependent Claim
17 words
An alkylidenediquinocyclopropane as claimed in claim 1 in which X and Y is a single group ##STR16##
Claim 7
Dependent Claim
13 words
An alkylidenediquinocyclopropane as claimed in claim 1 in which the compound is 1,2-Bis(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadiene-1-ylidene)-3-dicyanomethylenecyclopropane.
Claim 8
Dependent Claim
13 words
An alkylidenediquinocyclopropane as claimed in claim 1 in which the compound is 1,2-Bis(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene-3-carboethoxycyanomethylenecyclopropane.
Claim 9
Dependent Claim
13 words
An alkylidenediquinocyclopropane as claimed in claim 1 in which the compound is 1,2-Bis(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene)-3-diacetylmethylenecyclopropane.
Claim 10
Dependent Claim
13 words
An alkylidenediquinocyclopropane as claimed in claim 1 in which the compound is 1,2-Bis(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene)-3-(2',3',4',5'-tetrachloro-2',4'-cyclopentadien-1'-ylidene)cyclopropane.
Claim 11
Dependent Claim
13 words
An alkylidenediquinocyclopropane as claimed in claim 1 in which the compound is 1,2-Bis(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene)-3-(3',4'-dichloro-3'-cyclopenten-2',5'-dion-1'-ylidene)cyclopropane.
Claim 12
Dependent Claim
14 words
An alkylidenediquinocyclopropane as claimed in claim 1 in which the compound is 1,2-Bis(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene)-3-(indene-1',3'-dion-2'-ylidene) cyclopropane.
References Cited (Backward Citations)
US4052209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |