Patent US2666052A successfully refreshed from Google Patents.
US2666052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triazine fluorescent agents
Assignee: —
•
Filing: —
•
Granted: 1954-01-12
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Expires: 1971-01-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:32
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/54; C07D251/68; C07D403/00; C07D403/02; C07D403/12; C07D413/00; C07D413/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
13 words
A COMPOUND WHICH IN THE FORM OF THE FREE ACID HAS 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) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |