Patent US3888829A successfully refreshed from Google Patents.
US3888829A
Expired / Lapsed
US
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N,n'-bis(3-hydroxy-2-(3,4-dihydroxy-phenyl)-1-propyl)-aliphatic-diamines
Assignee: Sandoz AG
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Filing: 1972-06-20
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Granted: 1975-06-10
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Expires: 1992-06-20
Abstract
Abstract This invention provides new compounds of the formula: WHEREIN A is a - (CH2)n - group, WHEREIN N IS AN INTEGER FROM 2 TO 10, OR A WHEREIN M IS 2 OR 3, AND ACID ADDITION SALTS THEREOF. The compounds are bronchodilators useful in the treatment of bronchospasms.
Inventors
- 👤 Jean-Michel Bastian
- 👤 Klaus Hasspacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:34
CPC Classifications
C; C07; C07C; C07C213/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
8 words
The compound of claim 1, which is N,N''-Bis(3-hydroxy-2-(3,4-dihyroxyphenyl)-1-propyl)hexamethylenediamine.
Claim 4
Dependent Claim
8 words
The compound of claim 1, which is N,N''-Bis(3-hydroxy-2-(3,4-dihydroxyphenyl)-1-propyl)tetramethylenediamine.
Claim 5
Dependent Claim
8 words
The compound of claim 1, which is N,N''-Bis(3-hydroxy-2-(3,4-dihydroxyphenyl)-1-propyl)ethylenediamine.
Claim 6
Dependent Claim
8 words
The compound of claim 1, which is N,N''-Bis(3-hydroxy-2-(3,4-dihydroxyphenyl)-1-propyl)trimethylenediamine.
Claim 7
Dependent Claim
8 words
The compound of claim 1, which is N,N''-Bis(3-hydroxy-2-(3,4-dihydroxyphenyl)-1-propyl)octamethylenediamine.
Claim 8
Dependent Claim
8 words
The compound of claim 1, which is N,N''-Bis(3-hydroxy-2-(3,4-dihydroxypHenyl)-1-propyl)decamethylenediamine.
Claim 9
Dependent Claim
9 words
The compound of claim 1, which is 1,4-Bis(2-(3-hydroxy-2-(3,4-dihydroxyphenyl)-1-propylamino) ethyl)benzene.
References Cited (Backward Citations)
US3329709A
Cited
US3804899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |