US3896789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retinoic acid dipensing pressure sensitive dermotological tape
Assignee: Riker Laboratories Inc
•
Filing: 1974-06-10
•
Granted: 1975-07-29
•
Expires: 1994-06-10
Abstract
Abstract A pressure-sensitive adhesive tape comprising a backing with a layer of pressure-sensitive adhesive attached thereto, said pressure-sensitive adhesive layer comprising pressure-sensitive adhesive, a pharmaceutically effective concentration of retinoic acid, and retinoic acid stabilizer. The tape is useful for topical treatment of skin diseases.
Inventors
- 👤 Ronald J Trancik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:58
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C09J175/12; A; A61; A61F; A61F13/00; A61F13/02; A61F13/0203; A61F13/0206; A61F13/0209; A61F13/0223; A61F13/0226; A61F13/0246; A61F13/0253; A61F13/0256; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/44; A61L15/58; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G18/10; C08G18/12; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/38; A61L2300/00; A61L2300/20; A61L2300/21; Y; Y10; Y10S; Y10S602/00; Y10S602/903; Y10T; Y10T428/00; Y10T428/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A PRESSURE-SENSITIVE ADHESIVE TAPE DEFINING A MEANS FOR APPLYING A DERMATOLOGICAL SUBSTANCE COMPRISING A BACKING MEMBER WITH A LAYER OF PRESSURE-SENSITIVE ADHESIVE ATTACHED THERETO, AND A PHARMACEUTICALLY EFFECTIVE AND STABLE CONCENTRATION OF RETINOIC ACID AND RETINOIC ACID STABILIZER HOMOGENEOUSLY CONTAINED IN SAID PRESSURE-SENSITIVE ADHESIVE LAYER, SAID ADHESIVE BEING DERMATOLOGICALLY COMPATABLE AND BEING COMPATABLE AND SUBSTANTIALLY NON-REACTIVE TO SAID RETINOIC ACID AND RETINOIC ACID STABILIZER.
Claim 2
Dependent Claim
64 words
A PRESSURE-SENSITIVE ADHESIVE TAPE DEFINING A MEANS FOR APPLYING A DERMATOLOGICAL SUBSTANCE COMPRISING A BACKING MEMBER WITH A LAYER OF PRESSURE-SENSITIVE ADHESIVE ATTACHED THERETO, AND A PHARMACEUTICALLY EFFECTIVE AND STABLE CONCENTRATION OF RETINOIC ACID AND RETINOIC ACID STABILIZER HOMOGENEOUSLY CONTAINED IN SAID PRESSURE-SENSITIVE ADHESIVE LAYER, SAID ADHESIVE BEING DERMATOLOGICALLY COMPATABLE AND BEING COMPATABLE AND SUBSTANTIALLY NON-REACTIVE TO SAID RETINOIC ACID AND RETINOIC ACID STABILIZER.
Claim 3
Dependent Claim
62 words
The pressure-sensitive adhesive tape of claim 1 wherein said pressure-sensitive adhesive comprises an inherently rubbery and normally tacky polymer which is compatible and substantially non-reactive with retinoic acid at temperatures up to 60*C. and has a 100 percent modulus of less than 7 kg/cm2 and wherein said pressure-sensitive adhesive layer contains 0.001 to 5 percent by weight retinoic acid homogeneously distributed therein.
Claim 4
Dependent Claim
26 words
The tape of claim 2 wherein said stabilizer is selected from the group consisting of vitamin E, citric acid, butylated hydroxyanisole, butylated hydroxytoluene and mixtures thereof.
Claim 5
Dependent Claim
17 words
The tape of claim 3 wherein said stabilizer is a mixture of vitamin E and citric acid.
Claim 6
Dependent Claim
32 words
The tape of claim 2 wherein said inherently rubbery and normally tacky polymer comprises a polyurethane having at least 20 percent pendant chains and 100 percent modulus of less than 5 kg/cm2.
Claim 7
Dependent Claim
32 words
The tape of claim 4 wherein said inherently rubbery and normally tacky polymer comprises a polyurethane having at least 20 percent pendant chains and 100 percent modulus of less than 5 kg/cm2.
Claim 8
Dependent Claim
10 words
The tape of claim 2 wherein said backing is porous.
Claim 9
Dependent Claim
19 words
The tape of claim 2 wherein said pressure-sensitive adhesive layer contains 0.025 to 0.5 percent by weight retinoic acid.
References Cited (Backward Citations)
US3297034A
Cited
US3635755A
Cited
US3632740A
Cited
US3788296A
Cited
US3769071A
Cited
US3742951A
Cited
US3742951B1
Cited
US3814095A
Cited
US3777754A
Cited
US3797495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |