US2665313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 1, 6-naphthalenediol
Assignee: Honeywell International Inc
•
Filing: 1951-10-02
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Granted: 1954-01-05
•
Expires: 1971-10-02
Abstract
No abstract record available.
Inventors
- 👤 George F Lisk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:55
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/01; C07C37/045; C07C37/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A PROCESS FOR THE PREPARATION OF OF 1,6-NAPHTHALENEDIOL WHICH COMPRISES HEATING 1-AMINO-6HYDROXYNAPHTHALENE WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE, INORGANIC BISULFITE AND SUBJECTING THE REACTION MIXTURE TO ALKALINE HYDROLYSIS AND SUBSEQUENT ACIDIFICATION.
Claim 2
Dependent Claim
32 words
A PROCESS FOR THE PREPARATION OF OF 1,6-NAPHTHALENEDIOL WHICH COMPRISES HEATING 1-AMINO-6HYDROXYNAPHTHALENE WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE, INORGANIC BISULFITE AND SUBJECTING THE REACTION MIXTURE TO ALKALINE HYDROLYSIS AND SUBSEQUENT ACIDIFICATION.
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) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |