US3000947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical resolution of alpha-naphthylethylamines
Assignee: Chemetron Corp
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Filing: 1957-09-23
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Granted: 1961-09-19
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Expires: 1977-09-23
Abstract
No abstract record available.
Inventors
- 👤 Robert R Bottoms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:22
CPC Classifications
C; C09; C09D; C09D175/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A METHOD OF RESOLVING 1-AMINO-1-NAPHTHYLETHANE INTO OPTICALLY ACTIVE FORMS WHICH COMPRISES FORMING A SALT OF 1-AMINO-1-NAPHTHYLETHANE WITH AN OPTICALLY ACTIVE MENTHYL HYDROGEN PHTHALATE IN BENZENE, CRYSTALLIZING THE LESS SOLUBLE SALT OF AN OPTICALLY ACTIVE 1-AMINO-1-NAPHTHYLETHANE WITH SAID OPTICALLY ACTIVE MENTHYL HYDROGEN PHTHALATE FROM THE BENZENE SOLUTION, SEPARATING SAID SALT FROM SAID SOLUTION AND LIBERATING THE OPTICALLY ACTIVE 1AMINO-1-NAPHTHYLETHANE FROM SAID SALT BY TREATMENT WITH ACID.
Claim 2
Independent Claim
65 words
A METHOD OF RESOLVING 1-AMINO-1-NAPHTHYLETHANE INTO OPTICALLY ACTIVE FORMS WHICH COMPRISES FORMING A SALT OF 1-AMINO-1-NAPHTHYLETHANE WITH AN OPTICALLY ACTIVE MENTHYL HYDROGEN PHTHALATE IN BENZENE, CRYSTALLIZING THE LESS SOLUBLE SALT OF AN OPTICALLY ACTIVE 1-AMINO-1-NAPHTHYLETHANE WITH SAID OPTICALLY ACTIVE MENTHYL HYDROGEN PHTHALATE FROM THE BENZENE SOLUTION, SEPARATING SAID SALT FROM SAID SOLUTION AND LIBERATING THE OPTICALLY ACTIVE 1AMINO-1-NAPHTHYLETHANE FROM SAID SALT BY TREATMENT WITH ACID.
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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |