US3412089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of 4, 4'-dibenzoxazol-2-yl stilbene
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1964-09-16
•
Granted: 1968-11-19
•
Expires: 1984-09-16
Abstract
No abstract record available.
Inventors
- 👤 Ohkawa Masaaki
- 👤 Konoshita Tadao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:13
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07D263/62; D; D06; D06L; D06L4/00; D06L4/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A METHOF FOR PRODUCING 4,4''-DI-(BENZOXAZOLYL-(2))STILBENE COMPOUNDS HAVING THE FOLLOWING FORMULA,
Claim 2
Dependent Claim
10 words
A METHOF FOR PRODUCING 4,4''-DI-(BENZOXAZOLYL-(2))STILBENE COMPOUNDS HAVING THE FOLLOWING FORMULA,
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) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |