US3789119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized molded sublingual nitroglycerin tablets
Assignee: Parke Davis and Co LLC
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Filing: 1971-06-01
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Granted: 1974-01-29
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Expires: 1991-06-01
Abstract
Abstract Pharmaceutical compositions containing minor proportions of nitroglycerin and a non-volatile, water-soluble solvent in combination with a major proportion of a solid, water-soluble pharmaceutical carrier. Those compositions, in the form of tablets suitable for sublingual administration, can be produced by wetting a substantially dry mixture of the nitroglycerin and the solid, water-soluble pharmaceutical carrier with a solvent mixture containing a non-volatile, water-soluble solvent and a volatile solvent, forming the wetted mixture into tablets, and removing the volatile solvent.
Inventors
- 👤 S Fusari
- 👤 L Lueck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0053; A61K9/006; A61K31/00; A61K31/21; A61K9/20; A61K9/2004; A61K9/2013; A61K9/2018
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
25 words
A pharmaceutical composition according to claim 1 wherein the non-volatile, water-soluble solvent is a polyethylene glycol having an average molecular weight of 300 to 1,000.
Claim 2
Dependent Claim
21 words
A pharmaceutical composition according to claim 1 wherein the solid, water-soluble pharmaceutical carrier is substantially a mixture of lactose and sucrose.
Claim 3
Dependent Claim
21 words
A pharmaceutical composition according to claim 1 in the form of tablets containing 0.1 to 1.0 mg. of nitroglycerin per tablet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |