Patent US3873531A successfully refreshed from Google Patents.
US3873531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2{55 P-{8 2-(2-benzoxazolyl)vinyl{9 phenyl{56 oxazolo{8 5,4-b{9 pyridine fluorescent whitening agents
Assignee: Eastman Kodak Co
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Filing: 1974-03-29
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Granted: 1975-03-25
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Expires: 1994-03-29
Abstract
Abstract The compounds, 2-(p-(2-(2-benzoxazolyl)vinyl)phenyl)oxazolo(5,4b)pyridines are new compositions of matter useful for fluorescent whitening of textiles.
Inventors
- 👤 Edward U Elam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:25
CPC Classifications
C; C07; C07D; C07D498/00; C07D498/02; C07D498/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
5 words
THE COMPOUNDS HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
THE COMPOUNDS HAVING THE FORMULA
Claim 3
Dependent Claim
9 words
The compound according to claim 1 having the formula
Claim 4
Dependent Claim
9 words
The compound according to claim 1 having the formula
Claim 5
Dependent Claim
21 words
A fiber containing from about 0.05 to about 1.0% by weight of at least one of the compounds of claim 1.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |