Patent US2932652A successfully refreshed from Google Patents.
US2932652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-(1'-(alpha-naphthyl) 3'-oxo-butyl) 4-hydroxy coumarin and salts thereof
Assignee: Individual
•
Filing: 1957-02-11
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Granted: 1960-04-12
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Expires: 1977-02-11
Abstract
No abstract record available.
Inventors
- 👤 Nicholas M Molnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:15
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/42; C07D311/44; C07D311/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
MEMBERS OF THE GROUP CONSISTING OF 3-(1''A-NAPHTHYL-3''-OXO-BUTYL)-4-HYDROXY COUMARIN, AND THE WATERSOLUBLE SALTS THEREOF, SAID BEING SELECTED FROM THE GROUP CONSISTING OF SODIUM, TRIETHANOLAMINE AND AMMONIUM.
Claim 2
Dependent Claim
25 words
MEMBERS OF THE GROUP CONSISTING OF 3-(1''A-NAPHTHYL-3''-OXO-BUTYL)-4-HYDROXY COUMARIN, AND THE WATERSOLUBLE SALTS THEREOF, SAID BEING SELECTED FROM THE GROUP CONSISTING OF SODIUM, TRIETHANOLAMINE AND AMMONIUM.
References Cited (Backward Citations)
US2427578A
Cited
US2723276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |