US3845018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetylene substituted polyamide oligomers
Assignee: Raytheon Co
•
Filing: 1973-11-06
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Granted: 1974-10-29
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Expires: 1993-11-06
Abstract
Abstract 1. A COMPOUND HAVING THE FORMULA CHEMICAL STRUCTURE: HC*C-R''-((-CO-N(-)-CO-)>R"<(-CO-N(-)-CO-)-R)N-(-CO-N(-)- CO-)>R"<(-CO-N(-R''-C*CH)-CO-) WHEREIN R IS POLY(ARYLENE ETHER) OR POLY(ARYLENE THIOETHER), R'' IS ARYLENE OR DIARYLENE ETHER, N IS AN AVERAGE FROM 1 TO ABOUT 10, AND R" IS -(4,5-DI(-)-1,2-PHENYLENE)- OR -(4-(3,4-DI(-)-PHENYL-S-)-1,2-PHENYLENE)- AND X IS C=O, CH2, O. S, OR A BOND.
Inventors
- 👤 L Miller
- 👤 N Bilow
- 👤 A Landis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:57
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/27; C07C205/35; C07C205/36; C07C205/38; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1003; C08G73/1007; C08G73/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A COMPOUND HAVING THE FORMULA CHEMICAL STRUCTURE:
Claim 2
Dependent Claim
7 words
A COMPOUND HAVING THE FORMULA CHEMICAL STRUCTURE:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |