US4259318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poison ivy relief composition
Assignee: University of Houston
•
Filing: 1978-03-02
•
Granted: 1981-03-31
•
Expires: 1998-03-02
Abstract
Abstract The enzyme p-Diphenol Oxidase, also known as laccase, is effective in the treatment and/or prevention of poison ivy dermatitis by topical application to one's skin before or after exposure to the poison ivy irritant, urushiol.
Inventors
- 👤 Nanda V. Duhe
- 👤 Donald L. Hendrix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:48
CPC Classifications
A; A61; A61K; A61K38/00; A61K38/16; A61K38/43; A61K38/44; A61K8/00; A61K8/18; A61K8/30; A61K8/64; A61K8/66; A61Q; A61Q17/00; A61Q19/00; C; C12; C12Y; C12Y110/00; C12Y110/03; C12Y110/03002; A61K2800/00; A61K2800/74; A61K2800/75; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
33 words
A method for preventing dermatitis resulting from skin contact with urushiol toxin which comprises applying to the affected skin area an effective amount of the enzyme laccase derived from the fungus Polyporus versicolor.
Claim 2
Independent Claim
33 words
A method for preventing dermatitis resulting from skin contact with urushiol toxin which comprises applying to the affected skin area an effective amount of the enzyme laccase derived from the fungus Polyporus versicolor.
Claim 3
Dependent Claim
33 words
A method according to claim 1, wherein the laccase is applied at a concentration of from about 0.01 to about 1.0 percent within an acceptable dermatological cream, solid or emulsion as a carrier.
Claim 4
Independent Claim
30 words
A method of preventing poison ivy dermatitis wherein said method comprises applying to the affected skin area an effective amount of the enzyme laccase derived from the fungus Polyporus versicolor.
Claim 5
Independent Claim
30 words
A method of preventing poison ivy dermatitis wherein said method comprises applying to the affected skin area an effective amount of the enzyme laccase derived from the fungus Polyporus versicolor.
Claim 6
Dependent Claim
53 words
A composition useful in the prevention or treatment of dermatitis resulting from contact with a urushiol toxin comprising: between about 0.01 percent and about 1.0 percent by weight of the enzyme laccase derived from the fungus Polyporus versicolor; and the remaining weight being an acceptable dermatological cream, solid or emulsion as a carrier.
Claim 7
Dependent Claim
53 words
A composition useful in the prevention or treatment of dermatitis resulting from contact with a urushiol toxin comprising: between about 0.01 percent and about 1.0 percent by weight of the enzyme laccase derived from the fungus Polyporus versicolor; and the remaining weight being an acceptable dermatological cream, solid or emulsion as a carrier.
Claim 8
Independent Claim
34 words
A method for treating dermatitis resulting from skin contact with a urushiol toxin which comprises applying to the affected skin area an effective amount of the enzyme laccase derived from the fungus Polyporus versicolor.
Claim 9
Independent Claim
34 words
A method for treating dermatitis resulting from skin contact with a urushiol toxin which comprises applying to the affected skin area an effective amount of the enzyme laccase derived from the fungus Polyporus versicolor.
Claim 10
Dependent Claim
23 words
A method according to claim 1, wherein the application of the laccase to the skin takes place within six hours of said contact.
Claim 11
Dependent Claim
23 words
A method according to claim 1, wherein the application of the laccase to the skin takes place within one hour of said contact.
Claim 12
Dependent Claim
22 words
A method according to claim 2, wherein the application of laccase to the skin takes place within six hours of said contact.
Claim 13
Dependent Claim
33 words
A method according to claim 5, wherein the laccase is applied at a concentration of from about 0.01 to about 1.0 percent within an acceptable dermatological cream, solid or emulsion as a carrier.
Claim 14
Independent Claim
31 words
A method for treating poison ivy dermatitis wherein said said method comprises applying to the effected skin area an effective amount of the enzyme laccase derived from the fungus Polyporus versicolor.
Claim 15
Independent Claim
31 words
A method for treating poison ivy dermatitis wherein said said method comprises applying to the effected skin area an effective amount of the enzyme laccase derived from the fungus Polyporus versicolor.
Claim 16
Dependent Claim
19 words
A composition according to claim 4, wherein the carrier an acceptable dermatological cream, solid or emulsion as a carrier.
Claim 17
Dependent Claim
14 words
A composition according to claim 4, wherein the dermatological carrier is a suitable cream.
Claim 18
Dependent Claim
14 words
A composition according to claim 4, wherein the dermatological carrier is a suitable solid.
Claim 19
Dependent Claim
14 words
The composition according to claim 4, wherein the dermatological carrier is a suitable powder.
Claim 20
Dependent Claim
14 words
A composition according to claim 4, wherein the dermatological carrier is a suitable emulsion.
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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |