BioPharmaceutical Business Intelligence

  • Analyze global market entry opportunities
  • Obtain formulation and manufacturing information
  • Drug patents in 130+ countries

Upgrade to enjoy subscriber-only features like email alerts and data export. See the Plans and Pricing

Serving leading biopharmaceutical companies globally:

US Army
Argus Health
Federal Trade Commission
Queensland Health

Generated: December 17, 2017

DrugPatentWatch Database Preview

Details for Patent: 5,497,944

« Back to Dashboard

Summary for Patent: 5,497,944

Title: Atomising devices and methods
Abstract:A metered dose inhaler for dispensing a fluid medicament as droplets of small mean particle size without the use of pressurized gas or liquefied propellants. A liquid drug is contained in a fluid reservoir, and metered quantities of the drug are successively presented into a reduced cross-section pressure chamber, with non-return valves controlling the flow of liquid through the device. The metered quantity of the drug is then subjected to a sudden and great increase in pressure by releasing a piston into the pressure chamber. The liquid drug is thereby ejected through an atomizing head, to reduce it to a fine atomized spray of small mean particle size, preferably less than approximately 12 micrometers.
Inventor(s): Weston; Terence E. (Woodbridge, GB2), Dunne; Stephen T. (Shotley, GB2)
Assignee: DMW (Technology) Limited (GB)
Application Number:07/938,174
Patent Claim Types:
see list of patent claims
Device; Use; Delivery;

No matches for this query

Foreign Priority and PCT Information for Patent: 5,497,944

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom9006340Mar 21, 1990
United Kingdom9023767Nov 01, 1990
PCT Information
PCT FiledMarch 21, 1991PCT Application Number:PCT/GB91/00433
PCT Publication Date:October 03, 1991PCT Publication Number: WO91/14468

International Patent Family for Patent: 5,497,944

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria160947► Subscribe
Austria189413► Subscribe
Australia7548491► Subscribe
Australia650870► Subscribe
Brazil9106249► Subscribe
Canada2078683► Subscribe
Canada2206753► Subscribe
China1061362► Subscribe
China1042203► Subscribe
China1199009► 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.

For more information try a trial or see the plans and pricing

Serving leading biopharmaceutical companies globally:

Chinese Patent Office
Federal Trade Commission
Farmers Insurance
Fish and Richardson

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.

Copyright 2002-2017 thinkBiotech LLC
ISSN: 2162-2639

Secure SSL Encrypted
Privacy and Cookies
Terms & Conditions

Follow DrugPatentWatch: