Patent US4565121A successfully refreshed from Google Patents.
Patent US2694064A successfully refreshed from Google Patents.
US2694064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triazese optical brightening agents
Assignee: —
•
Filing: —
•
Granted: 1954-11-09
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Expires: 1971-11-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:33
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/14; C07D251/24; C07D251/26; C07D251/40; C07D251/54; C07D251/68; D; D21; D21H; D21H21/00; D21H21/14; D21H21/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
AN OPTICAL BRIGHTENING AGENT SELECTED FROM THE GROUP CONSISTING OF DISULPHONIC ACID CORRESPONDING TO THE FORMULA:
Claim 2
Dependent Claim
16 words
AN OPTICAL BRIGHTENING AGENT SELECTED FROM THE GROUP CONSISTING OF DISULPHONIC ACID CORRESPONDING TO 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) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |