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Generated: October 19, 2017
Which drugs does patent 6,340,475 protect, and when does it expire?
| Title: | Extending the duration of drug release within the stomach during the fed mode |
| Abstract: | Drugs are formulated as unit oral dosage forms by incorporating them into polymeric matrices comprised of hydrophilic polymers that swell upon imbibition of water to a size that is large enough to promote retention of the dosage form in the stomach during the fed mode. The oral formulation is designed for gastric retention and controlled delivery of an incorporated drug into the gastric cavity, and thus administered, the drug is released from the matrix into the gastric fluid by solution diffusion. The swollen polymeric matrix, having achieved sufficient size, remains in the gastric cavity for several hours if administered while the patient is in the fed mode, and remains intact long enough for substantially all of the drug to be released before substantial dissolution of the matrix occurs. The swelling matrix lowers the accessibility of the gastric fluid to the drug and thereby reduces the drug release rate. This process, together with diffusion retardation by selection of specific polymers, polymer molecular weights, and other variables, results in a sustained and controlled delivery rate of the drug to the gastric cavity. |
| Inventor(s): | Shell; John W. (Hillsborough, CA), Louie-Helm; Jenny (Union City, CA), Markey; Micheline (Santa Cruz, CA) |
| Assignee: | DepoMed, Inc. (Menlo Park, CA) |
| Application Number: | 09/282,233 |
|
Patent Claim Types: see list of patent claims | Formulation; Dosage form; Use; |
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For Orange Book-listed patents (shown in the main table above) generic applications must certify that the listed patents are expired, invalid, or will not be infringed by generic entry.
The non-Orange Book patents listed below do not require formal certifications, so they do not automatically impede generic entry. Instead, they represent potential opportunities for branded firms to block generic entry through patent infringment challenges.
| Patent No. | Title | Estimated Patent Expiration | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6,635,280 | Extending the duration of drug release within the stomach during the fed mode | ► Subscribe | |||||||||||||
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Because of the complexity of determining patent expiration dates it is advisable to have patent counsel verify freedom to operate.
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| Country | Document Number | Estimated Expiration | Supplementary Protection Certificate | SPC Country | SPC Expiration | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Austria | 302597 | ► Subscribe | |||||||||||||
| Australia | 729529 | ► Subscribe | |||||||||||||
| Australia | 8138698 | ► Subscribe | |||||||||||||
| Canada | 2290624 | ► Subscribe | |||||||||||||
| Canada | 2364845 | ► Subscribe | |||||||||||||
| Germany | 69831335 | ► Subscribe | |||||||||||||
| European Patent Office | 0998271 | ► Subscribe | |||||||||||||
| Spain | 2248908 | ► Subscribe | |||||||||||||
| Hong Kong | 1027298 | ► Subscribe | |||||||||||||
| Japan | 2000513028 | ► Subscribe | |||||||||||||
| This preview shows a limited data set Subscribe for full access, or try a Trial | |||||||||||||||
The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws,
it is advisable to have patent counsel verify freedom to operate.
Export unavailable in trial.
Subscribe for complete access.
Serving leading biopharmaceutical companies globally:
Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. thinkBiotech performs no independent verifification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.
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