Patent US2737516A successfully refreshed from Google Patents.
US2737516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent whitening agents
Assignee: EIDP Inc
•
Filing: 1955-05-02
•
Granted: 1956-03-06
•
Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Sartori Mario Francesco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:55
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07D263/62; C07D263/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A COMPOUND OF THE GROUP CONSISTING OF 2-(P-(2BENZIMIDAZOLYL)PHENYL)-NAPHTH(1,2)OXAZOLE, 2-(P-(2BENZOTHIAZOLYL)PHENYL)-NAPHTH(1,2)OXAZOLE, 2-(P-(2BENZOXAZOLYL)PHENYL)-NAPHTH(1,2)OXAZOLE AND THEIR MONOSULFO DERIVATIVES.
Claim 2
Dependent Claim
14 words
A COMPOUND OF THE GROUP CONSISTING OF 2-(P-(2BENZIMIDAZOLYL)PHENYL)-NAPHTH(1,2)OXAZOLE, 2-(P-(2BENZOTHIAZOLYL)PHENYL)-NAPHTH(1,2)OXAZOLE, 2-(P-(2BENZOXAZOLYL)PHENYL)-NAPHTH(1,2)OXAZOLE AND THEIR MONOSULFO DERIVATIVES.
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) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |