Patent US2320770A successfully refreshed from Google Patents.
US4230105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transdermal delivery of drugs
Assignee: Merck and Co Inc
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Filing: 1978-11-13
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Granted: 1980-10-28
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Expires: 1998-11-13
Abstract
Abstract An improved method for the topical administration of systemically or locally active drugs utilizes a bandage containing one or more layers including a drug useful in the treatment of disease and a heat-generating substance, each dispersed intimately throughout said bandage layers.
Inventors
- 👤 Richard J. Harwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:17
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; A; A61; A61K; A61K9/00; A61K9/70; A61K9/7023; A61K9/703; A61K9/7038; A61K9/7046; A61K9/7053; B32B2535/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
An improved medical bandage for the administration of drug through the skin or mucosa which comprises a layered bandage comprising first a heat-generating layer containing a hydrate-forming inorganic salt dispersed throughout an inactive matrix layer, and second, a pressure-sensitive adhesive area containing drug to be administered to the patient, dispersed intimately throughout said adhesive layer.
Claim 2
Dependent Claim
55 words
An improved medical bandage for the administration of drug through the skin or mucosa which comprises a layered bandage comprising first a heat-generating layer containing a hydrate-forming inorganic salt dispersed throughout an inactive matrix layer, and second, a pressure-sensitive adhesive area containing drug to be administered to the patient, dispersed intimately throughout said adhesive layer.
Claim 3
Dependent Claim
55 words
An improved medical bandage for the administration of drug through the skin or mucosa which comprises a layered bandage comprising first a heat-generating layer containing a heat-generating chemical substance dispersed throughout an inactive matrix layer, and second, a pressure-sensitive adhesive area containing drug to be administered to the patient, dispersed intimately throughout said adhesive layer.
Claim 4
Dependent Claim
55 words
An improved medical bandage for the administration of drug through the skin or mucosa which comprises a layered bandage comprising first a heat-generating layer containing a heat-generating chemical substance dispersed throughout an inactive matrix layer, and second, a pressure-sensitive adhesive area containing drug to be administered to the patient, dispersed intimately throughout said adhesive layer.
References Cited (Backward Citations)
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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) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |