US2597445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-alkylamino-methyl-phenyl-propane and method of preparing same
Assignee: Wyeth LLC
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Filing: 1948-12-23
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Granted: 1952-05-20
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Expires: 1968-12-23
Abstract
No abstract record available.
Inventors
- 👤 William F Bruce
- 👤 Szabo Joseph Lester
- 👤 Tubis Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:21
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/16; C07C213/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
AS A NEW COMPOUND, 1-HALO-2-(N-LOWER ALKYLAMINO)-2-METHYL-1-PHENYL PROPANE WHEREIN HALO REPRESENTS A HALOGEN OF THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE.
Claim 2
Dependent Claim
21 words
AS A NEW COMPOUND, 1-HALO-2-(N-LOWER ALKYLAMINO)-2-METHYL-1-PHENYL PROPANE WHEREIN HALO REPRESENTS A HALOGEN OF THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE.
Claim 3
Dependent Claim
89 words
THE PROCESS COMPRISING REACTING 2-AMINO-2METHYL-1-PHENYL-1-PROPANOL WITH BENZALDEHYDE, ALKYLATING THE PRODUCT BY REACTION WITH A LOWER ALKYL HALIDE, THEN HYDROLYZING THE ALKYLATED, HALIDE REACTION PRODUCT UNDER ACID CONDITIONS WITH AN AQUEOUS SOLUTION OF AN ORGANIC, LOWER ALKYL, CARBOXYLIC ACID AND A SOLUBLE SALT OF A WEAK ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL AND ALKALINE EARTH METAL SALT, SAID SALT ACTING AS A HALIDE-BINDING AND BUFFERING AGENT, AND THEN HALOGENATING THE HYDROLYZED PRODUCT WITH A HALOGENATING AGENT TO FORM AS THE DESIRED PRODUCT 1-HALO-2-(N-LOWER ALKYLAMINO-2METHYL-1-PHENYL PROPANE.
Claim 4
Dependent Claim
89 words
THE PROCESS COMPRISING REACTING 2-AMINO-2METHYL-1-PHENYL-1-PROPANOL WITH BENZALDEHYDE, ALKYLATING THE PRODUCT BY REACTION WITH A LOWER ALKYL HALIDE, THEN HYDROLYZING THE ALKYLATED, HALIDE REACTION PRODUCT UNDER ACID CONDITIONS WITH AN AQUEOUS SOLUTION OF AN ORGANIC, LOWER ALKYL, CARBOXYLIC ACID AND A SOLUBLE SALT OF A WEAK ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL AND ALKALINE EARTH METAL SALT, SAID SALT ACTING AS A HALIDE-BINDING AND BUFFERING AGENT, AND THEN HALOGENATING THE HYDROLYZED PRODUCT WITH A HALOGENATING AGENT TO FORM AS THE DESIRED PRODUCT 1-HALO-2-(N-LOWER ALKYLAMINO-2METHYL-1-PHENYL PROPANE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |