US3190799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing inhalation therapy
Assignee: Dart Industries Inc
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Filing: 1963-03-21
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Granted: 1965-06-22
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Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Cohen Sheldon
- 👤 Gerald A Laursen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:02
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/007; A61K9/0073; A61K9/008; A61K31/00; A61K31/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A METHOD OF TREATING A PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALT OF 1-(3,5-DIHYDROXYPHENYL)-1-HYDROXY2-ISOPROPYLAMINOETHANE CONTAINING A 1 TO 3 CARBON ATOM LOWER ALKANOL OF CRYSTALLIZATION TO YIELD A MATERIAL ADAPTED TO PREPARATION OF A STABLE PRESSURIZED SUSPENSION THEREOF WHICH COMPRISES REDUCING THE PARTICLES SIZE OF SAID SALT SUCH THAT 95% BY WEIGHT OF THE PARTICLES HAVE A DIAMETER OF LESS THAN 10 MICRONS AND HEATING THE RESULTING FINELY DIVIDED MATERIAL TO A TEMPERATURE BETWEEN ABOUT 40*C. AND ABOUT 100*C. FOR A TIME SUFFICIENT TO REDUCE THE QUANTITY OF SAID LOWER ALKANOL OF CRYSTALLIZATION TO LESS THAN 0.1% BY WEIGHT.
Claim 2
Independent Claim
97 words
A METHOD OF TREATING A PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALT OF 1-(3,5-DIHYDROXYPHENYL)-1-HYDROXY2-ISOPROPYLAMINOETHANE CONTAINING A 1 TO 3 CARBON ATOM LOWER ALKANOL OF CRYSTALLIZATION TO YIELD A MATERIAL ADAPTED TO PREPARATION OF A STABLE PRESSURIZED SUSPENSION THEREOF WHICH COMPRISES REDUCING THE PARTICLES SIZE OF SAID SALT SUCH THAT 95% BY WEIGHT OF THE PARTICLES HAVE A DIAMETER OF LESS THAN 10 MICRONS AND HEATING THE RESULTING FINELY DIVIDED MATERIAL TO A TEMPERATURE BETWEEN ABOUT 40*C. AND ABOUT 100*C. FOR A TIME SUFFICIENT TO REDUCE THE QUANTITY OF SAID LOWER ALKANOL OF CRYSTALLIZATION TO LESS THAN 0.1% BY WEIGHT.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |