US2671784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorine-fast fluorescent optical
Assignee: —
•
Filing: —
•
Granted: 1954-03-09
•
Expires: 1971-03-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:02
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/54; C07D251/68; A; A61; A61Q; A61Q5/00; A61Q5/08; C07D403/00; C07D403/02; C07D403/12; C07D413/00; C07D413/14; C11; C11D; C11D3/00; C11D3/40; C11D3/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE NEW FLUORESCENT OPTICAL BLEACHING AGENTS OF THE FORMULA
Claim 2
Dependent Claim
9 words
THE NEW FLUORESCENT OPTICAL BLEACHING AGENTS OF THE 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) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |