US3120520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-styrylbenzoxazole brighteners
Assignee: Wyeth Holdings LLC
•
Filing: 1961-11-17
•
Granted: 1964-02-04
•
Expires: 1981-11-17
Abstract
No abstract record available.
Inventors
- 👤 Bennett G Buell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:23
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B23/145
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
5 words
THE COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
5 words
THE COMPOUND OF THE FORMULA
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) | 1967-02-03 | 1967-08-05 | 1968-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-03 | 1971-08-05 | 1972-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-03 | 1975-08-05 | 1976-02-04 | $7700.00 | Window Closed / Lapsed |