Patent US4276226A successfully refreshed from Google Patents.
US4276226A
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Methyl- and chloro- substituted aromatic diketodiols
Assignee: EIDP Inc
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Filing: 1979-07-23
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Granted: 1981-06-30
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Expires: 1999-07-23
Abstract
Abstract Aromatic diketones and diesters are provided of the formula ##STR1## wherein R is independently methyl or chloro; R' is independently hydrogen or R; R 2 is 1,4-phenylene, 1,3-phenylene, 2,6-naphthylene, 4,4'-biphenylene, or 4,4'-biphenylene ether; and R 3 is hydrogen or ##STR2## where R 4 is a hydrocarbon group of 1-10 carbon atoms.
Inventors
- 👤 Robert A. Clement
- 👤 Burton C. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:21
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/82; C07C49/83; C07C49/84
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
48 words
Diketodiol or diester of the formula ##STR20## wherein R is independently methyl or chloro; R' is independently hydrogen or R; R 2 is 1,4-phenylene, 1,3-phenylene, 2,6-naphthylene, 4,4'-biphenylene or 4,4'-biphenylene ether and R 3 is hydrogen or ##STR21## where R 4 is a hydrocarbon group of 1-10 carbon atoms.
Claim 2
Dependent Claim
48 words
Diketodiol or diester of the formula ##STR20## wherein R is independently methyl or chloro; R' is independently hydrogen or R; R 2 is 1,4-phenylene, 1,3-phenylene, 2,6-naphthylene, 4,4'-biphenylene or 4,4'-biphenylene ether and R 3 is hydrogen or ##STR21## where R 4 is a hydrocarbon group of 1-10 carbon atoms.
Claim 3
Dependent Claim
12 words
A diketodiol or diester of claim 1 wherein R 2 is 1,4-phenylene.
Claim 4
Dependent Claim
12 words
A diketodiol or diester of claim 1 wherein R 2 is 1,3-phenylene.
Claim 5
Dependent Claim
12 words
A diketodiol or diester of claim 1 wherein R 2 is 2,6-naphthylene.
Claim 6
Dependent Claim
12 words
A diketodiol or diester of claim 1 wherein R 2 is 4,4'-biphenylene.
Claim 7
Dependent Claim
13 words
A diketodiol or diester of claim 1 wherein R 2 is 4,4'-biphenylene ether.
Claim 8
Dependent Claim
20 words
A diketodiol or diester of claim 1 wherein R and R 1 are the same and are methyl or chloro.
Claim 9
Dependent Claim
12 words
A diketodiol or diester of claim 7 wherein R 2 is 1,4-phenylene.
Claim 10
Dependent Claim
12 words
A diketodiol or diester of claim 7 wherein R 2 is 1,3-phenylene.
Claim 11
Dependent Claim
12 words
A diketodiol or diester of claim 7 wherein R 2 is 2,6-naphthylene.
Claim 12
Dependent Claim
12 words
A diketodiol or diester of claim 7 wherein R 2 is 4,4'-biphenylene.
Claim 13
Dependent Claim
13 words
A diketodiol or diester of claim 7 wherein R 2 is 4,4'-biphenylene ether.
Claim 14
Dependent Claim
18 words
A diketodiol or diester of claim 1 wherein R is methyl or chloro and R 1 is hydrogen.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |