US4284834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diethynyl aromatic hydrocarbons which homopolymerize and char efficiently after cure
Assignee: Raytheon Co
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Filing: 1979-12-26
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Granted: 1981-08-18
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Expires: 1999-12-26
Abstract
Abstract Diethynyl substituted aromatic hydrocarbons are prepared which homopolymerize into resins suitable for use as high char materials.
Inventors
- 👤 William B. Austin
- 👤 Norman Bilow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:25
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/76; C07C49/782; C07C49/784; C07C15/00; C07C15/40; C07C15/50; C07C45/00; C07C45/45; C07C45/46; C07C47/00; C07C47/20; C07C47/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
Compounds having melting points of less than 150° C. which homopolymerize at temperatures below 200° C. and char efficiently whose structural formulas are: ##STR4## wherein n may range from 0 to 4.
Claim 2
Dependent Claim
32 words
Compounds having melting points of less than 150° C. which homopolymerize at temperatures below 200° C. and char efficiently whose structural formulas are: ##STR4## wherein n may range from 0 to 4.
Claim 3
Dependent Claim
9 words
A compound of claim 1 wherein n is 0.
Claim 4
Dependent Claim
32 words
A compound of claim 1 wherein n is 0 and the acetylene substituents on the phenyl rings are in a para position relative to the methylene group which separates said phenyl rings.
Claim 5
Dependent Claim
34 words
A homopolymerizable diethynyl substituted aromatic compound which melts at a temperature below 100° C. and whose structure is selected from the group consisting of ##STR5## wherein n may range from 0 to about 4.
Claim 6
Dependent Claim
34 words
A homopolymerizable diethynyl substituted aromatic compound which melts at a temperature below 100° C. and whose structure is selected from the group consisting of ##STR5## wherein n may range from 0 to about 4.
Claim 7
Dependent Claim
9 words
A compound of claim 4 wherein n is 0.
Claim 8
Dependent Claim
32 words
A compound of claim 1 wherein n is 0 and the acetylene substituents on the phenyl rings are in a meta position relative to the methylene group which separates said phenyl rings.
Claim 9
Dependent Claim
50 words
A compound of claim 1 wherein n is 0 and one of the acetylene substituents on one phenyl ring is in a meta position and the second acetylene substituent is in the para position on the other phenyl ring with respect to the methylene group which separates said phenyl rings.
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) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |