US4136107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bisorthodinitriles
Assignee: United States Department of the Navy
•
Filing: 1977-10-20
•
Granted: 1979-01-23
•
Expires: 1997-10-20
Abstract
Abstract Compounds of the general formula: ##STR1## wherein R 1 is a radical of an isomer of phthalaldehyde; R 2 is aadical of an isomer of an aromatic dialdehyde selected from the class consisting of phthalaldehyde, naphthalene dialdehyde, phenanthrene dialdehyde, anthracene dialdehyde, biphenyl dialdehyde, terphenyl dialdehyde; and mixtures thereof and R 3 is a radical of an isomer of an aromatic diamine selected from the class consisting of benzene diamine, naphthalene diamine, phenanthrene diamine anthracene diamine, biphenyl diamine, and terphenyl diamine, and the cyano-condensation resins thereof which are useful in preparing semiconductors.
Inventors
- 👤 James R. Griffith
- 👤 Jacques G. O'Rear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:06
CPC Classifications
C; C07; C07C; C07C255/00; C08; C08G; C08G73/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
29 words
A bisorthodinitrile of the general formula: ##STR11## wherein R 2 is selected from the class consisting of ##STR12## and R 3 is selected from the class consisting of ##STR13##
Claim 2
Dependent Claim
29 words
A bisorthodinitrile of the general formula: ##STR11## wherein R 2 is selected from the class consisting of ##STR12## and R 3 is selected from the class consisting of ##STR13##
Claim 3
Dependent Claim
27 words
The bisorthodinitrite of claim 1 wherein R 2 is selected from the class consisting of ##STR14## and R 3 is selected from the class consisting of ##STR15##
Claim 4
Dependent Claim
21 words
The bisorthodinitrile of claim 1 wherein R 2 is selected from the class consisting of ##STR16## and R 3 is ##STR17##
Claim 5
Dependent Claim
10 words
The bisorthodinitrile of claim 2 wherein R 2 is ##STR18##
Claim 6
Dependent Claim
10 words
The bisorthodinitrile of claim 4 wherein R 2 is ##STR19##
Claim 7
Dependent Claim
10 words
The bisorthodinitrile of claim 1 wherein R 2 is ##STR20##
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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |