US4035431A
Expired / Lapsed
US
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Alkylene-linked aromatic compounds
Assignee: Motors Liquidation Co
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Filing: 1975-09-26
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Granted: 1977-07-12
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Expires: 1995-09-26
Abstract
Abstract In accordance with a preferred embodiment of this invention, an alkylene-linked dixylyl compound having the following structural formula is synthesized, ##STR1## wherein n may vary from 3 to 18. These compounds may be readily oxidized and dehydrated to form the corresponding alkylene-linked dianhydride which is useful as a precursor in the formation of alkylene-linked polyimide compounds and as a cross-linking or hardening agent in many curable polymer systems such as the epoxy resins.
Inventors
- 👤 Larry F. Charbonneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:20
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
An alkylene-linked aromatic hydrocarbon compound which may readily be oxidized and dehydrated to form the corresponding dianhydride, said aromatic having the following structural formula: ##STR4## wherein R 1 is selected from the class consisting of --CH 3 , --CH 2 CH 3 , CH 3 --CH--CH 3 and n may vary from 3 to 18.
Claim 2
Dependent Claim
55 words
An alkylene-linked aromatic hydrocarbon compound which may readily be oxidized and dehydrated to form the corresponding dianhydride, said aromatic having the following structural formula: ##STR4## wherein R 1 is selected from the class consisting of --CH 3 , --CH 2 CH 3 , CH 3 --CH--CH 3 and n may vary from 3 to 18.
Claim 3
Dependent Claim
18 words
An alkylene-linked dixylyl compound having the following structural formula: ##STR5## wherein n may vary from 3 to 18.
Claim 4
Dependent Claim
18 words
An alkylene-linked dixylyl compound having the following structural formula: ##STR5## wherein n may vary from 3 to 18.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |