US2903484A
Expired / Lapsed
US
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Reaction of naphthols with hydrogen sulfide
Assignee: Wyeth Holdings LLC
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Filing: 1957-10-22
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Granted: 1959-09-08
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Expires: 1977-10-22
Abstract
No abstract record available.
Inventors
- 👤 William B Hardy
- 👤 Jack H Thelin
- 👤 Furman Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:40
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/02; C07C319/08; C07C319/10; C07C319/14; C07C319/22; C07C319/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS OF PREPARING NAPHTHYL SULFIDES AND NAPHTHALENE THIOLS WHICH COMPRISES HEATING TO ABOVE ABOUT 70*C., BUT NOT ABOVE 200*C., A NAPHTHALENE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF OXY, ALKOXY AND ACYLOXY NAPHTHALENES WITH HYDROGEN SULFIDE IN THE PRESENCE OF AT LEAST 1 PART OF AN ACID CATALYST PER 20 PARTS BY WEIGHT OF SAID NAPHTHOL, THE SAID CATALYST BEING SELECTED FROM THE GROUP CONSISTING OF LOWER ALKANE, SULFONIC ACIDS, MONOCYCLIC CARBOCYCLIC ARYL SULFONIC ACIDS AND NON-OXIDIZING MINERAL ACIDS.
Claim 2
Dependent Claim
80 words
A PROCESS OF PREPARING NAPHTHYL SULFIDES AND NAPHTHALENE THIOLS WHICH COMPRISES HEATING TO ABOVE ABOUT 70*C., BUT NOT ABOVE 200*C., A NAPHTHALENE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF OXY, ALKOXY AND ACYLOXY NAPHTHALENES WITH HYDROGEN SULFIDE IN THE PRESENCE OF AT LEAST 1 PART OF AN ACID CATALYST PER 20 PARTS BY WEIGHT OF SAID NAPHTHOL, THE SAID CATALYST BEING SELECTED FROM THE GROUP CONSISTING OF LOWER ALKANE, SULFONIC ACIDS, MONOCYCLIC CARBOCYCLIC ARYL SULFONIC ACIDS AND NON-OXIDIZING MINERAL ACIDS.
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) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |