US4910308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,5-distyrylpyrazines
Assignee: Polyplastics Co Ltd
•
Filing: 1988-10-21
•
Granted: 1990-03-20
•
Expires: 2008-10-21
Abstract
Abstract A reactive 2,5-distyrylpyrazine compound having the formula <IMAGE> (I) <IMAGE> wherein X is COCH3 or H, and a polymer obtained from the compound.
Inventors
- 👤 Takuma Teshirogi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:56
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/02; C07D241/10; C07D241/12; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1085
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
18 words
A 2,5-distyrylpyrazine compound represented by the following structural formula (I): ##STR13## wherein X is COCH 3 or H.
Claim 2
Dependent Claim
18 words
A 2,5-distyrylpyrazine compound represented by the following structural formula (I): ##STR13## wherein X is COCH 3 or H.
Claim 3
Dependent Claim
13 words
The 2,5-distyrylpyrazine compound according to claim 1, wherein X is COCH 3 .
Claim 4
Dependent Claim
11 words
The 2,5-distyrylpyrazine compound according to claim 1, wherein X is H.
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) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |