US4783450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of commercial lecithin as skin penetration enhancer
Assignee: Warner Lambert Co LLC
•
Filing: 1987-04-13
•
Granted: 1988-11-08
•
Expires: 2007-04-13
Abstract
Abstract A method of enhancing penetration of a drug through the skin or other biological membranes using lecithin is herein described along with pharmaceutical compositions containing effective amounts of lecithin as a penetration enhancer.
Inventors
- 👤 Mahdi B. Fawzi
- 👤 Uma R. Iyer
- 👤 Majid Mahjour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:22
CPC Classifications
A; A61; A61K; A61K47/00; A61K47/06; A61K47/24; A61K9/00; A61K9/0012; A61K9/0014; A61P; A61P11/00; A61P11/08; A61P11/14; A61P25/00; A61P25/04; A61P43/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
47 words
A process for enhancing penetration of a drug through the skin or other biological membranes which comprises administering to the skin or other biological membrane of a host in need thereof a pharmaceutical composition containing an effective amount of procaterol and an effective amount of commercial lecithin.
Claim 2
Dependent Claim
47 words
A process for enhancing penetration of a drug through the skin or other biological membranes which comprises administering to the skin or other biological membrane of a host in need thereof a pharmaceutical composition containing an effective amount of procaterol and an effective amount of commercial lecithin.
Claim 3
Dependent Claim
16 words
A process according to claim 1, wherein the effective amount of lecithin is 2 to 40%.
Claim 4
Dependent Claim
16 words
A process according to claim 1, wherein the effective amount of lecithin is 5 to 10%.
Claim 5
Dependent Claim
28 words
A pharmaceutical composition adapted for transdermal or transmucosal administration comprising an effective amount of procaterol, an effective amount of commercial lecithin, and one or more pharmaceutically acceptable excipients.
Claim 6
Dependent Claim
28 words
A pharmaceutical composition adapted for transdermal or transmucosal administration comprising an effective amount of procaterol, an effective amount of commercial lecithin, and one or more pharmaceutically acceptable excipients.
Claim 7
Dependent Claim
15 words
A composition according to claim 4, wherein the amount of lecithin is 2 to 40%.
Claim 8
Dependent Claim
15 words
A composition according to claim 4, wherein the amount of lecithin is 5 to 10%.
References Cited (Backward Citations)
GB2001334A
Cited
US4364930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |