US4601897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prazosin-pirbuterol combination for bronchodilation
Assignee: Pfizer Inc
•
Filing: 1985-11-06
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Granted: 1986-07-22
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Expires: 2005-11-06
Abstract
Abstract A method for relaxing bronchial tissue in mammals, including humans, by use of a combination of prazosin and pirbuterol or their pharmaceutically acceptable acid addition salts.
Inventors
- 👤 Craig A. P. D. Saxton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:55
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/505; A61P; A61P11/00; A61P11/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
59 words
A method for relaxing bronchial tissue in a mammalian subject which comprises contacting said tissue with a bronchodilating effective amount of a mixture of from 10 to 90 parts by weight of prazosin or a pharmaceutically acceptable acid addition salt thereof and from 90 to 10 parts by weight of pirbuterol or a pharmaceutically acceptable acid addition salt thereof.
Claim 2
Independent Claim
59 words
A method for relaxing bronchial tissue in a mammalian subject which comprises contacting said tissue with a bronchodilating effective amount of a mixture of from 10 to 90 parts by weight of prazosin or a pharmaceutically acceptable acid addition salt thereof and from 90 to 10 parts by weight of pirbuterol or a pharmaceutically acceptable acid addition salt thereof.
Claim 3
Dependent Claim
29 words
A method according to claim 1 wherein said mixture contains from 20 to 50 parts by weight of prazosin and from 80 to 50 parts by weight of pirbuterol.
Claim 4
Dependent Claim
14 words
A method according to claim 1 wherein prazosin hydrochloride and pirbuterol dihydrochloride are employed.
Claim 5
Dependent Claim
17 words
A method according to claim 1 wherein said contacting is effected by means of an aerosol syray.
Claim 6
Dependent Claim
56 words
A pharmaceutical composition for aerosol syraying which comprises a pharmaceutically acceptable carrier and a bronchodilating effective amount of a mixture of from 10 to 90 parts by weight of prazosin or a pharmaceutically acceptable acid addition salt thereof and from 90 to 10 parts by weight of pirbuterol or a pharmaceutically acceptable acid addition salt thereof.
Claim 7
Dependent Claim
56 words
A pharmaceutical composition for aerosol syraying which comprises a pharmaceutically acceptable carrier and a bronchodilating effective amount of a mixture of from 10 to 90 parts by weight of prazosin or a pharmaceutically acceptable acid addition salt thereof and from 90 to 10 parts by weight of pirbuterol or a pharmaceutically acceptable acid addition salt thereof.
Claim 8
Dependent Claim
30 words
A pharmaceutical composition according to claim 5 wherein said mixture contains from 20 to 50 parts by weight of prazosin and from 80 to 50 parts by weight of pirbuterol.
Claim 9
Dependent Claim
15 words
A pharmaceutical composition according to claim 6 wherein prazosin hydrochloride and pirbuterol dihydrochloride are employed.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |